Fix centerGrid option to adhere to docs. It said it defaulted to YES, but it didn't. Defaults to YES now.
Fix centerGrid option to adhere to docs. It said it defaulted to YES, but it didn't. Defaults to YES now.

matej/GMGridView,Sensis/GMGridView,BlessNeo/GMGridView,PocketScientists/GMGridView,SuPair/GMGridView,jianwoo/GMGridView,gmoledina/GMGridView,liulinjian/GMGridView,loverly/GMGridView,D-cocoa/GMGridView,fhchina/GMGridView,d191562687/GMGridView,gank0326/GMGirdView,gelosie/GMGridView