Update how uirefreshcontrol handles threading.
Rearranged code.
Update errorMessage to "Failed" / "No Internet Connection"
on Grid View
Update errorMessage to "Failed" / "No Internet Connection"
on Main View
Update errorMessage to "Failed" / "No Internet Connection"
on Search View
disabled switching between grid and list views while refreshing stories
Merge remote-tracking branch 'origin/3.6/ipad-news' into 3.6/ipad-news-update-stories

Conflicts:
	Modules/News/iPad/View Controllers/MITNewsiPadCategoryViewController.m
Merge pull request #113 from MIT-Mobile/3.6/ipad-news-update-stories

3.6/ipad news update stories