Changed layout to avoid "stuttering" caused by switching between views rapidly.
Added basic blue background images.
Merge branch 'dev' of https://github.com/jgiffordmm/ChatterCheckinDF13 into dev

Conflicts:
	ChatterCheckin2/Classes/Controllers/Initial/InitialViewController.xib
Added new Check-in view controller with updated UI and behaviors. Added new tab bar icons.
Added constraints because checkin view wasn't placed correctly.
Merge remote-tracking branch 'origin/jbarker/ui_modifications' into dev