* Reimplement IGListKit support in a cleaner way
* Rename and fix some stuff
* Fix supplementaries more
* Update docs
* Update test
* Cleanup minor things
* Tweak it
* Indentation
* Remove irrelevant changes
* Break out cell into its own file
* Fix indentation
* Address feedback
- overrode the -(void)fetchData method in PhotoCellNode.m to download the photo’s comments. This method gets called with the PhotoCellNode enters ASInterfaceStateFetchData, which is set by the rangeController.
- UIKIT COMPARISON: I left the comment bulk download (for all photos in a page load) in the PhotoFeedViewController side for UIKit because when implemented in the PhotoTableViewCell, each cell jumped around as it changed size when it came on screen.
- minor appearance updates
- updated color scheme
- fixed status bar style to darkBackgroundColor
- cleaned up layoutSpecThatFits: in PhotoCellNode