Close gh-171. .fadeTo() and .fadeIn() cross-reference.
Merge branch 'master' of github.com:jquery/api.jquery.com
Added CONTRIBUTING.md.
CONTRIBUTING: Added link to #jquery-content.
Fix a few entries with multiple return types:

* .get(), .prop(), and .val()
* Closes #291
1.9.1-9
1.9.1-10
jQuery.When(): Clarifying example code
Change notes to use warning class instead of blockquotes.
1.9.1-11
.get(): Split into 2 signatures and update content.
Update jQuery.trim.xml

Removed the word "two" from the example description on line 27.
Another quick change, catching the other "two" spaces
Merge branch 'master' of github.com:jquery/api.jquery.com
See #13880. Clarify usage of jQuery.ajax contentType.
Document X-Requested-With header, close gh-303.
.length and .size() are Integer, close gh-302. Thanks @andyli!
Note that $(window).trigger() is special, close gh-298.
Remove unused myValue parameter, close gh-290.
Split .get() into 2 separate entries