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.
Update selector.html
Update selector-css2.js
Update request module and node engine requirements
Fixes #973: 'valuechange' event e.stopPropagation

'valuechange' event now supports e.stopPropagation() and
e.stopImmediatePropagation().
Remove path.existsSync as part of node 0.8 minimum environment
Further 'valuechange' event fixes.

Fix tests according to rgrove's comments.

Consider the condition in which there are two listeners on the same
element and added test for it:
Listener 1 calls e.stopPropagation(),
Listener 2 calls e.stopImmediatePropagation()
Update event-valuechange history.
Build event-valuechange.
Merge branch 'patch-3' of git://github.com/ziggyism/yui3 into dev-master
Update dom history.
Build selector-css2.