Defined an API for the image manager.
Implemented a basic caching-enabled image manager.
Some nib tweaks.
Implement basic banner display.
Updated the model object to consume the mobile banner where appropriate.
Enabled URLs on collection view banners.
Disabled rotation on the main view controller because banners.
Added a timer to animate the banner.
Updated timer interval form 2.5 to 3.0 seconds and tweaked banner cycle to use the total number of banners instead of a hardcoded value.