Refactored typed arrays.

previous:
```
PS C:\Users\aval\tsdev\TypeScript> node built\local\tsc.js --diagnostics --p src\compiler\tsconfig.json
Files:            36
Lines:         93186
Nodes:        445312
Identifiers:  168285
Symbols:       71668
Types:         32088
Memory used: 371617K
I/O read:      0.02s
I/O write:     0.17s
Parse time:    0.71s
Bind time:     0.62s
Check time:    2.90s
Emit time:     2.06s
Total time:    6.29s
```

now:
```
PS C:\Users\aval\tsdev\TypeScript> node built\local\tsc.js --diagnostics --p src\compiler\tsconfig.json
Files:            36
Lines:         91099
Nodes:        439748
Identifiers:  166769
Symbols:       71022
Types:         31979
Memory used: 369763K
I/O read:      0.02s
I/O write:     0.03s
Parse time:    0.69s
Bind time:     0.59s
Check time:    2.92s
Emit time:     1.89s
Total time:    6.09s
```

Fixes microsoft#15402

Author: NaridaL

src/lib/es2015.iterable.d.ts

@@ -209,7 +209,7 @@ interface String {
     [Symbol.iterator](): IterableIterator<string>;
 }
 
-interface Int8Array {
+interface TypedArray<T> {
     [Symbol.iterator](): IterableIterator<number>;
     /**
      * Returns an array of key, value pairs for every entry in the array
@@ -225,243 +225,14 @@ interface Int8Array {
     values(): IterableIterator<number>;
 }
 
-interface Int8ArrayConstructor {
-    new (elements: Iterable<number>): Int8Array;
+interface TypedArrayConstructor<T> {
+    new (elements: Iterable<number>): T;
 
     /**
      * Creates an array from an array-like or iterable object.
      * @param arrayLike An array-like or iterable object to convert to an array.
      * @param mapfn A mapping function to call on every element of the array.
      * @param thisArg Value of 'this' used to invoke the mapfn.
      */
-    from(arrayLike: Iterable<number>, mapfn?: (v: number, k: number) => number, thisArg?: any): Int8Array;
-}
-
-interface Uint8Array {
-    [Symbol.iterator](): IterableIterator<number>;
-    /**
-     * Returns an array of key, value pairs for every entry in the array
-     */
-    entries(): IterableIterator<[number, number]>;
-    /**
-     * Returns an list of keys in the array
-     */
-    keys(): IterableIterator<number>;
-    /**
-     * Returns an list of values in the array
-     */
-    values(): IterableIterator<number>;
-}
-
-interface Uint8ArrayConstructor {
-    new (elements: Iterable<number>): Uint8Array;
-
-    /**
-     * Creates an array from an array-like or iterable object.
-     * @param arrayLike An array-like or iterable object to convert to an array.
-     * @param mapfn A mapping function to call on every element of the array.
-     * @param thisArg Value of 'this' used to invoke the mapfn.
-     */
-    from(arrayLike: Iterable<number>, mapfn?: (v: number, k: number) => number, thisArg?: any): Uint8Array;
-}
-
-interface Uint8ClampedArray {
-    [Symbol.iterator](): IterableIterator<number>;
-    /**
-     * Returns an array of key, value pairs for every entry in the array
-     */
-    entries(): IterableIterator<[number, number]>;
-
-    /**
-     * Returns an list of keys in the array
-     */
-    keys(): IterableIterator<number>;
-
-    /**
-     * Returns an list of values in the array
-     */
-    values(): IterableIterator<number>;
-}
-
-interface Uint8ClampedArrayConstructor {
-    new (elements: Iterable<number>): Uint8ClampedArray;
-
-
-    /**
-     * Creates an array from an array-like or iterable object.
-     * @param arrayLike An array-like or iterable object to convert to an array.
-     * @param mapfn A mapping function to call on every element of the array.
-     * @param thisArg Value of 'this' used to invoke the mapfn.
-     */
-    from(arrayLike: Iterable<number>, mapfn?: (v: number, k: number) => number, thisArg?: any): Uint8ClampedArray;
-}
-
-interface Int16Array {
-    [Symbol.iterator](): IterableIterator<number>;
-    /**
-     * Returns an array of key, value pairs for every entry in the array
-     */
-    entries(): IterableIterator<[number, number]>;
-
-    /**
-     * Returns an list of keys in the array
-     */
-    keys(): IterableIterator<number>;
-
-    /**
-     * Returns an list of values in the array
-     */
-    values(): IterableIterator<number>;
-}
-
-interface Int16ArrayConstructor {
-    new (elements: Iterable<number>): Int16Array;
-
-    /**
-     * Creates an array from an array-like or iterable object.
-     * @param arrayLike An array-like or iterable object to convert to an array.
-     * @param mapfn A mapping function to call on every element of the array.
-     * @param thisArg Value of 'this' used to invoke the mapfn.
-     */
-    from(arrayLike: Iterable<number>, mapfn?: (v: number, k: number) => number, thisArg?: any): Int16Array;
-}
-
-interface Uint16Array {
-    [Symbol.iterator](): IterableIterator<number>;
-    /**
-     * Returns an array of key, value pairs for every entry in the array
-     */
-    entries(): IterableIterator<[number, number]>;
-    /**
-     * Returns an list of keys in the array
-     */
-    keys(): IterableIterator<number>;
-    /**
-     * Returns an list of values in the array
-     */
-    values(): IterableIterator<number>;
-}
-
-interface Uint16ArrayConstructor {
-    new (elements: Iterable<number>): Uint16Array;
-
-    /**
-     * Creates an array from an array-like or iterable object.
-     * @param arrayLike An array-like or iterable object to convert to an array.
-     * @param mapfn A mapping function to call on every element of the array.
-     * @param thisArg Value of 'this' used to invoke the mapfn.
-     */
-    from(arrayLike: Iterable<number>, mapfn?: (v: number, k: number) => number, thisArg?: any): Uint16Array;
-}
-
-interface Int32Array {
-    [Symbol.iterator](): IterableIterator<number>;
-    /**
-     * Returns an array of key, value pairs for every entry in the array
-     */
-    entries(): IterableIterator<[number, number]>;
-    /**
-     * Returns an list of keys in the array
-     */
-    keys(): IterableIterator<number>;
-    /**
-     * Returns an list of values in the array
-     */
-    values(): IterableIterator<number>;
-}
-
-interface Int32ArrayConstructor {
-    new (elements: Iterable<number>): Int32Array;
-
-    /**
-     * Creates an array from an array-like or iterable object.
-     * @param arrayLike An array-like or iterable object to convert to an array.
-     * @param mapfn A mapping function to call on every element of the array.
-     * @param thisArg Value of 'this' used to invoke the mapfn.
-     */
-    from(arrayLike: Iterable<number>, mapfn?: (v: number, k: number) => number, thisArg?: any): Int32Array;
-}
-
-interface Uint32Array {
-    [Symbol.iterator](): IterableIterator<number>;
-    /**
-     * Returns an array of key, value pairs for every entry in the array
-     */
-    entries(): IterableIterator<[number, number]>;
-    /**
-     * Returns an list of keys in the array
-     */
-    keys(): IterableIterator<number>;
-    /**
-     * Returns an list of values in the array
-     */
-    values(): IterableIterator<number>;
-}
-
-interface Uint32ArrayConstructor {
-    new (elements: Iterable<number>): Uint32Array;
-
-    /**
-     * Creates an array from an array-like or iterable object.
-     * @param arrayLike An array-like or iterable object to convert to an array.
-     * @param mapfn A mapping function to call on every element of the array.
-     * @param thisArg Value of 'this' used to invoke the mapfn.
-     */
-    from(arrayLike: Iterable<number>, mapfn?: (v: number, k: number) => number, thisArg?: any): Uint32Array;
-}
-
-interface Float32Array {
-    [Symbol.iterator](): IterableIterator<number>;
-    /**
-     * Returns an array of key, value pairs for every entry in the array
-     */
-    entries(): IterableIterator<[number, number]>;
-    /**
-     * Returns an list of keys in the array
-     */
-    keys(): IterableIterator<number>;
-    /**
-     * Returns an list of values in the array
-     */
-    values(): IterableIterator<number>;
-}
-
-interface Float32ArrayConstructor {
-    new (elements: Iterable<number>): Float32Array;
-
-    /**
-     * Creates an array from an array-like or iterable object.
-     * @param arrayLike An array-like or iterable object to convert to an array.
-     * @param mapfn A mapping function to call on every element of the array.
-     * @param thisArg Value of 'this' used to invoke the mapfn.
-     */
-    from(arrayLike: Iterable<number>, mapfn?: (v: number, k: number) => number, thisArg?: any): Float32Array;
-}
-
-interface Float64Array {
-    [Symbol.iterator](): IterableIterator<number>;
-    /**
-     * Returns an array of key, value pairs for every entry in the array
-     */
-    entries(): IterableIterator<[number, number]>;
-    /**
-     * Returns an list of keys in the array
-     */
-    keys(): IterableIterator<number>;
-    /**
-     * Returns an list of values in the array
-     */
-    values(): IterableIterator<number>;
-}
-
-interface Float64ArrayConstructor {
-    new (elements: Iterable<number>): Float64Array;
-
-    /**
-     * Creates an array from an array-like or iterable object.
-     * @param arrayLike An array-like or iterable object to convert to an array.
-     * @param mapfn A mapping function to call on every element of the array.
-     * @param thisArg Value of 'this' used to invoke the mapfn.
-     */
-    from(arrayLike: Iterable<number>, mapfn?: (v: number, k: number) => number, thisArg?: any): Float64Array;
+    from(arrayLike: Iterable<number>, mapfn?: (v: number, k: number) => number, thisArg?: any): T;
 }

src/lib/es2016.array.include.d.ts

@@ -16,79 +16,7 @@ interface ReadonlyArray<T> {
     includes(searchElement: T, fromIndex?: number): boolean;
 }
 
-interface Int8Array {
-    /**
-     * Determines whether an array includes a certain element, returning true or false as appropriate.
-     * @param searchElement The element to search for.
-     * @param fromIndex The position in this array at which to begin searching for searchElement.
-     */
-    includes(searchElement: number, fromIndex?: number): boolean;
-}
-
-interface Uint8Array {
-    /**
-     * Determines whether an array includes a certain element, returning true or false as appropriate.
-     * @param searchElement The element to search for.
-     * @param fromIndex The position in this array at which to begin searching for searchElement.
-     */
-    includes(searchElement: number, fromIndex?: number): boolean;
-}
-
-interface Uint8ClampedArray {
-    /**
-     * Determines whether an array includes a certain element, returning true or false as appropriate.
-     * @param searchElement The element to search for.
-     * @param fromIndex The position in this array at which to begin searching for searchElement.
-     */
-    includes(searchElement: number, fromIndex?: number): boolean;
-}
-
-interface Int16Array {
-    /**
-     * Determines whether an array includes a certain element, returning true or false as appropriate.
-     * @param searchElement The element to search for.
-     * @param fromIndex The position in this array at which to begin searching for searchElement.
-     */
-    includes(searchElement: number, fromIndex?: number): boolean;
-}
-
-interface Uint16Array {
-    /**
-     * Determines whether an array includes a certain element, returning true or false as appropriate.
-     * @param searchElement The element to search for.
-     * @param fromIndex The position in this array at which to begin searching for searchElement.
-     */
-    includes(searchElement: number, fromIndex?: number): boolean;
-}
-
-interface Int32Array {
-    /**
-     * Determines whether an array includes a certain element, returning true or false as appropriate.
-     * @param searchElement The element to search for.
-     * @param fromIndex The position in this array at which to begin searching for searchElement.
-     */
-    includes(searchElement: number, fromIndex?: number): boolean;
-}
-
-interface Uint32Array {
-    /**
-     * Determines whether an array includes a certain element, returning true or false as appropriate.
-     * @param searchElement The element to search for.
-     * @param fromIndex The position in this array at which to begin searching for searchElement.
-     */
-    includes(searchElement: number, fromIndex?: number): boolean;
-}
-
-interface Float32Array {
-    /**
-     * Determines whether an array includes a certain element, returning true or false as appropriate.
-     * @param searchElement The element to search for.
-     * @param fromIndex The position in this array at which to begin searching for searchElement.
-     */
-    includes(searchElement: number, fromIndex?: number): boolean;
-}
-
-interface Float64Array {
+interface TypedArray<T> {
     /**
      * Determines whether an array includes a certain element, returning true or false as appropriate.
      * @param searchElement The element to search for.