[collections] Initial addition of collection view model feature.
[collections] Rename pass #2.

Everything updated to use collection view.
[collections] More renaming and register cells.
[collections] Fleshing out size calculations.
[collections] Add support for item size calculation.
[collections] Provide access to the cell factory classes rather than embed size calculations.

Different layouts calculate sizes in different ways so there's no effective
way to define generic layout calculation for collection items.
[collections] Docs and delete the mutable collection view model because it's untested.
[collections] Remove deleted files from the project.
[collections] Add support for supplementary views.
[models] Pass the indexPath as the second argument to table actions.
iOS 6.0 SDK upgrades. Replace all UILineBreakModes with NSLineBreakModes.
Nimbus updated for deployment on iOS 6 and up.
[models] Add support for generating unique cell.object identifiers to NICellFactory.
[models] Remove missing semicolons.
[collections] Add shouldAppendObjectClassToReuseIdentifier to the factory.
Merge remote-tracking branch 'upstream/master'