CollectionViews should trigger event after initializing child views.
Minor change to description of backone mixin spec.
Initial work on GroupedCollectionView.
GroupedCollectionView basically working
Ability to work with multiple groups.
Sane default for GroupedCollectionView#name_for_group
Renaming `toggle_grouping` to `toggle_group`.
Allow GroupedCollectionView to handle inactive groups.
Some refactoring of GroupedCollectionView.
Moving goup header template into property, makes it easier to override.
Minor spec cleanup.
Bugfix to backbone_mixin.
Extending events would override events up the prototype chain for views
being extended.