added smooth transition between thumbnail and wiki image; added some documentation
Merge remote-tracking branch 'dz1111/ImageTransition'

Conflicts:
	Commons-iOS/DetailTableViewController.m
	Commons-iOS/TableViewController.m
speed up the transition on the detail view thumb->image

Was at 2.2seconds which felt a bit slow to me. Sped up to 0.5seconds. :D
remove unneeded tableview boilerplate