README.md: clean up and add "support" section

Break long lines to be <= 80 chars, where possible, and
add a new section to guide users to the appropriate place
for support (Arduino forum for product support, issue
tracker for bugs & features).

Author: eriknyquist

README.md

@@ -6,13 +6,44 @@ The contents of this repo is distributed through releases in Arduino IDE.
 If you wish to use the latest **untested** changes, follow these instructions.
 
 1. Install the latest `Intel Curie Boards by Intel` from `Boards Manager`
-2. Download the [latest snapshot](https://github.com/01org/corelibs-arduino101/archive/master.zip) of this repo
+2. Download the [latest snapshot](https://github.com/01org/corelibs-arduino101/archive/master.zip)
+   of this repo
 3. Shut down the IDE
 4. Go to Arduino15 directory
   * Windows: `C:\Users\<user>\AppData\Roaming\Arduino15`
   * OS X: `~/Library/Arduino15`
   * Linux: `~/.arduino15`
 5. Go to `packages/Intel/hardware/arc32/<version>/`
-6. Delete the content of the directory from step 5, and replace it with the content of the "corelibs-arduino101-master" folder in the zip from step 2.
+6. Delete the content of the directory from step 5, and replace it with the
+   content of the "corelibs-arduino101-master" folder in the zip from step 2.
 
-Future upgrades may fail since the internal contents were modified by hand. In order to recover, shut down the IDE, delete the entire `Arduino15` directory, then restart the IDE.
+Future upgrades may fail since the internal contents were modified by hand. In
+order to recover, shut down the IDE, delete the entire `Arduino15` directory,
+then restart the IDE.
+
+# Support & Issues
+
+If you have found a bug, or you believe a new feature should be added, please
+use the Github issue tracker (click "Issues" above) to provide details about
+the bug or feature. If you need product support (e.g. have a question about /
+are having problems with the Arduino IDE or the Arduino API), please direct
+them to the [support forum](https://forum.arduino.cc/index.php?board=103).
+
+## Examples of things that should go in the Issue tracker
+
+> "I noticed that your DoSomeThing library doesn't support all the same
+> modes as the library from SomeOtherGuy: https://link-to-relevant-thing.com
+> Can you add support for these modes?"
+
+> "If I run example sketch X on an Arduino 101 board, I get result Y. But if I
+> run the same sketch on an Arduino UNO board, I get result Z. This looks like
+> a bug to me."
+
+## Examples of things that should go in the support forum
+
+> "I'm having trouble downloading the Arduino 101 boards package in the Arduino
+> IDE Boards Manager"
+
+> "How do I use this library?"
+
+> "I can't get this example sketch to work. What am I doing wrong?"