Revamp the README, and add the AUTHORS and CONTRIBUTORS files

Author: zimmski

APACHE-LICENSE-2.0.txt renamed to APACHE-LICENSE-2.0

@@ -0,0 +1,24 @@
+# This is the official list of go-diff authors for copyright purposes.
+# This file is distinct from the CONTRIBUTORS files.
+# See the latter for an explanation.
+
+# Names should be added to this file as
+#	Name or Organization <email address>
+# The email address is not required for organizations.
+
+# Please keep the list sorted.
+
+Danny Yoo <[email protected]>
+James Kolb <[email protected]>
+Jonathan Amsterdam <[email protected]>
+Markus Zimmermann <[email protected]> <[email protected]> <[email protected]>
+Matt Kovars <[email protected]>
+Örjan Persson <[email protected]>
+Osman Masood <[email protected]>
+Robert Carlsen <[email protected]>
+Rory Flynn <[email protected]>
+Sergi Mansilla <[email protected]>
+Shatrugna Sadhu <[email protected]>
+Shawn Smith <[email protected]>
+Tor Arvid Lund <[email protected]>
+Zac Bergquist <[email protected]>

AUTHORS

@@ -0,0 +1,31 @@
+# This is the official list of people who can contribute
+# (and typically have contributed) code to the go-diff
+# repository.
+#
+# The AUTHORS file lists the copyright holders; this file
+# lists people.  For example, ACME Inc. employees would be listed here
+# but not in AUTHORS, because ACME Inc. would hold the copyright.
+#
+# When adding J Random Contributor's name to this file,
+# either J's name or J's organization's name should be
+# added to the AUTHORS file.
+#
+# Names should be added to this file like so:
+#     Name <email address>
+#
+# Please keep the list sorted.
+
+Danny Yoo <[email protected]>
+James Kolb <[email protected]>
+Jonathan Amsterdam <[email protected]>
+Markus Zimmermann <[email protected]> <[email protected]> <[email protected]>
+Matt Kovars <[email protected]>
+Örjan Persson <[email protected]>
+Osman Masood <[email protected]>
+Robert Carlsen <[email protected]>
+Rory Flynn <[email protected]>
+Sergi Mansilla <[email protected]>
+Shatrugna Sadhu <[email protected]>
+Shawn Smith <[email protected]>
+Tor Arvid Lund <[email protected]>
+Zac Bergquist <[email protected]>

CONTRIBUTORS

@@ -1,4 +1,4 @@
-Copyright (c) 2012 Sergi Mansilla <[email protected]>
+Copyright (c) 2012-2016 The go-diff Authors. All rights reserved.
 
 Permission is hereby granted, free of charge, to any person obtaining a
 copy of this software and associated documentation files (the "Software"),

LICENSE.txt renamed to LICENSE

@@ -1,40 +1,81 @@
-# go-diff [![GoDoc](https://godoc.org/github.com/sergi/go-diff?status.png)](https://godoc.org/github.com/sergi/go-diff) [![Build Status](https://travis-ci.org/sergi/go-diff.svg?branch=master)](https://travis-ci.org/sergi/go-diff) [![Coverage Status](https://coveralls.io/repos/sergi/go-diff/badge.png?branch=master)](https://coveralls.io/r/sergi/go-diff?branch=master)
+# go-diff [![GoDoc](https://godoc.org/github.com/sergi/go-diff?status.png)](https://godoc.org/github.com/sergi/go-diff/diffmatchpatch) [![Build Status](https://travis-ci.org/sergi/go-diff.svg?branch=master)](https://travis-ci.org/sergi/go-diff) [![Coverage Status](https://coveralls.io/repos/sergi/go-diff/badge.png?branch=master)](https://coveralls.io/r/sergi/go-diff?branch=master)
 
-Go-diff is a Go language port of Neil Fraser's google-diff-match-patch code. His original code is available at:
+go-diff offers algorithms to perform operations required for synchronizing plain text:
 
-http://code.google.com/p/google-diff-match-patch/
+- Compare two texts and return their differences.
+- Perform fuzzy matching of text.
+- Apply patches onto text.
 
-## Current state for this Go library
+## Installation
 
-In order to run the tests:
+```bash
+go get -u github.com/sergi/go-diff/...
+```
 
-`cd diff && go test`
+## Usage
 
-## Installation
+The following example compares two texts and writes out the differences to standard output.
+
+```go
+package main
+
+import (
+	"fmt"
+
+	"github.com/sergi/go-diff/diffmatchpatch"
+)
+
+const (
+	text1 = "Lorem ipsum dolor."
+	text2 = "Lorem dolor sit amet."
+)
+
+func main() {
+	dmp := diffmatchpatch.New()
+
+	diffs := dmp.DiffMain(text1, text2, false)
+
+	fmt.Println(dmp.DiffPrettyText(diffs))
+}
+```
+
+## Found a bug or are you missing a feature in go-diff?
+
+Please make sure to have the latest version of go-diff. If the problem still persists go through the [open issues](https://github.com/sergi/go-diff/issues) in the tracker first. If you cannot find your request just open up a [new issue](https://github.com/sergi/go-diff/issues/new).
+
+## How to contribute?
+
+You want to contribute to go-diff? GREAT! If you are here because of a bug you want to fix or a feature you want to add, you can just read on. Otherwise we have a list of [open issues in the tracker](https://github.com/sergi/go-diff/issues). Just choose something you think you can work on and discuss your plans in the issue by commenting on it.
+
+Please make sure that every behavioral change is accompanied by test cases. Additionally, every contribution must pass the `lint` and `test` Makefile targets which can be run using the following commands in the repository root directory.
+
+```bash
+make lint
+make test
+```
+
+After your contribution passes these commands, [create a PR](https://help.github.com/articles/creating-a-pull-request/) and we will review your contribution.
+
+## Origins
 
-    go get github.com/sergi/go-diff/diffmatchpatch
+go-diff is a Go language port of Neil Fraser's google-diff-match-patch code. His original code is available at [http://code.google.com/p/google-diff-match-patch/](http://code.google.com/p/google-diff-match-patch/).
 
 ## Copyright and License
 
-The original Google Diff, Match and Patch Library is licensed under
-the [Apache License 2.0](http://www.apache.org/licenses/LICENSE-2.0).
-The full terms of that license are included here in the
-`APACHE-LICENSE-2.0` file.
+The original Google Diff, Match and Patch Library is licensed under the [Apache License 2.0](http://www.apache.org/licenses/LICENSE-2.0). The full terms of that license are included here in the [APACHE-LICENSE-2.0](/APACHE-LICENSE-2.0) file.
 
 Diff, Match and Patch Library
 
-  Written by Neil Fraser
-  Copyright (c) 2006 Google Inc.
-  <http://code.google.com/p/google-diff-match-patch/>
+> Written by Neil Fraser
+> Copyright (c) 2006 Google Inc.
+> <http://code.google.com/p/google-diff-match-patch/>
 
-This Go version of Diff, Match and Patch Library is licensed under
-the [MIT License](http://www.opensource.org/licenses/MIT) (a.k.a.
-the Expat License) which is included here in the `LICENSE` file.
+This Go version of Diff, Match and Patch Library is licensed under the [MIT License](http://www.opensource.org/licenses/MIT) (a.k.a. the Expat License) which is included here in the [LICENSE](/LICENSE) file.
 
 Go version of Diff, Match and Patch Library
 
-  Copyright (c) 2012 Sergi Mansilla <[email protected]>
-  <https://github.com/sergi/go-diff>
+> Copyright (c) 2012-2016 The go-diff authors. All rights reserved.
+> <https://github.com/sergi/go-diff>
 
 Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: