Start building hooks to allow collection view to change its layout.
Checkpoint.
Remove scrollView subclass accessor.
Provide subclassing methods for modifying the paging scroll view's layout.
When not in paging scroll view mode, adjust the collection view to fit self.bounds.
Checkpoint for working rotations and prep for layout changes.
Implement z-index and remove iOS 7-only completion method use.
Checkpoint for photos transitioning to grid view. Animate to grid view is complete.
Note about using iOS 7 method.
When animating to another layout make sure to adjust the collection view frame.
Faster timings.
Remove custom shit in preparation for simpler animation.
Add subclass method for setting the center page index.
Disable paging when switching layouts.
Enable scrollsToTop in grid mode.
Checkpoint for swishing while scrolled.
Checkpoint for simpler animations.
Docs and cleanup.
Add debugging flags to ensure rotation methods are called. Enable scroll indicators.
More docs and moving methods around.