* 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
* Start removing ASChangeSetDataController
* Continue removing ASChangeSetDataController
* Remove unnecessary change
* ASDataController is no longer an abstract class, remove its assertion
* Get back beginUpdates and endUpdatesAnimated:completion in ASCollectionNode
- Objects conform to ASSectionContext protocol can be provided via ASCollectionDataSource and later retrieved from the collection view. They are guaranteed to be in sync with sections of the collection view. They can be used to store additional data associated with each section, to be used in collection view layout and the like.
- ASSection is an internal object that is the foundation for coming debugging tools.
- Unit tests included.
[ASRangeController] We're already on main thread, remove blocks
Make data source read-only, clarify what's asynchronous
[ASDataController] Clean up some interfaces
[ASDataController] A little more cleanup
[ASDataController] Cleanup
[ASDataController] Restore some changes, exit more often
[ASDataController] Use item counts that we already have rather than requerying them
[ASDataController] Revert weakifications
[ASDataController] Add a mechanism to measure how much work we avoided
