Summary:
Take 2. Remove `IGListCollectionView` per #409. Use plain old `UICollectionView`.
(This re-applies D4640425 and updates as needed.)
Also:
- run `pod update` everywhere
- update changelog
Reviewed By: paulvanderspek
Differential Revision: D4812207
fbshipit-source-id: 1ddbae06cdeddb43d8af175d3e8a045a36ff150e
Summary:
Add 2 new unit test files for IGListCollectionView. One is for storyboards and the other for when creating the IGListCollectionView in code.
- [X] All tests pass. Demo project builds and runs.
- [X] I added tests, an experiment, or detailed why my change isn't tested.
- [X] I have reviewed the [contributing guide](https://github.com/Instagram/IGListKit/blob/master/.github/CONTRIBUTING.md)
Closes https://github.com/Instagram/IGListKit/pull/303
Differential Revision: D4304615
Pulled By: rnystrom
fbshipit-source-id: c6edbcd493fe4ee087ce3d0aee80db484207859d