Generate view controller factory

[zenangst]

It should be possible to generate a view controller factory for all the generated features.
I think this would be a kick-ass feature to have if you use dependency containers with factories.

• Generate view controllers for UICollectionViewFeature Adds base view controller factory for UICollectionViewFeature #9
• Generate view controllers for UITableViewFeature Add support for UITableViewFeature in the view controller factory #11