Made YKUIActionSheet _contexts a retaining array.
Merge branch 'master' of github.com:Yelp/YelpKit into nav_bar_no_drawrect
Added YKAssertSelectorImplemented.
Change documents directory in GHUnit tests.
Fix overwrite flag when copying resources
Added another selector implemented assert in YKUIControl.
Merge branch 'master' of github.com:Yelp/YelpKit into nav_bar_no_drawrect
Added an animated title change test