grid view and FiftyTwoFrames model

implemented grid view and FiftyTwoFrames model for Facebook requesting
and packaging model objects
Album menu thumbnails and year popover

added a coverPhotoURL property to FTFAlbum, added thumbnails for every
album in the album menu, and tapered the width of the year popover a
bit.
added FTFAlbumCategoryCollection and refactoring

added FTFAlbumCategoryCollection and refactored album menu vc and
content vc
constraint fixes and time formatted comment date

fixed comment view constraints, made view shift up when keyboard
appears, and added updating formatted date label on comments
added activity indicator cell class and custom caption view class