Only allow deleting if we have at least 2 layers.
Handle deleting.
Add code signing stuff to deploying to a device.
Handle... stuff... with layers.
Don't hard code the sprite.
Handle selection moving.
Add CMPMapEditorScrollView.
Remove UIScrollView from storyboard.
Update CMPMapEditorViewController.
Layout stuffs.
Add segment control to switch between modes.
Move and group methods.
Add JCTiledScrollView.
Add CMPTileManager.
Remove CMPMapEditorScrollView.
Rename CMPMapTileManager.
Add CMPEditorTileManager.
Store tile sheet path.
Add MGImageUtilities