Updated content from webplatform.org (css.json) - 4/29/13
Merge pull request #3658 from adobe/adrock/quickdocs

Updated content from webplatform.org (css.json) - 4/29/13
Be specific about the expectation to touch base with the community before starting to work on it.
Merge branch 'master' of https://github.com/adobe/brackets into larz/quick-open-tweaks
Updated based on @peterflynn's feedback.