Changed the year from 2012 to 2013.
Merge pull request #186 from diegotres/master

Changed the year from 2012 to 2013.
Fix jQuery #13281: only use sourceIndex for connected nodes
No ticket: allow for empty rbuggyMatches
Description for siblingCheck
Maintain original sort order in detached node sorting in Webkit. Fixes jQuery #13331. gibson rules. Close gh-187.