Adding CONTRIBUTING.md Fixes #857
add missing carriage return
Updating formatting and wrapping
Update CONTRIBUTING.md

Removed unnecessary block of text relevant only to the wiki version.
Adding block for Pull Request context
Fixing new issues link
Clean up throttle tests
Check false positives when testing the value of `this`
Fix issue #472

This commit fixes #472 by replacing cssreset/cssfonts
dependency with cssnormalize.
Unit test for fixing Y.Object.keys() bug on Android
Modify native Object.keys test to deal with buggy Android implementation
Y.Object.keys() shim for Android 2.3.x and Opera. Fixes #658.
Added test for making sure prototypes aren't considered in hasNoKeys()
Uses Y.Object.keys() in YUITest.hasNoKeys(), to bypass Android 2.3.x faulty implementation. Fixes #658.
Uses Y.Object.keys() in YUITest.hasNoKeys(), to bypass Android 2.3.x faulty implementation. Fixes #658.
Minor fix for ObjectAssert tests.
Clarify use of non-native Y.Object.keys() shim
Adds additional documentation to _hasProtoEnumBug
Add UA matching for IE 11+ and Opera 15+ (with Blink). Fixes #954 and #955

IE 11 introduces a new useragent that doesn't contain "MSIE", so we
sniff for "Trident" instead.

Opera 15 switches to the Blink engine and masquerades as Chrome and
Safari. We sniff for "OPR" to identify it as Opera, and also extract the
reported WebKit version (although this isn't really a real WebKit
version anymore, so at some point we should probably add sniffing
specifically for Blink).

Also refactored the UA test loop to be less goddamn cryptic.
Update history.