- Renamed to "ActivityLogger" to be more focused in usage.
- Extracted out query elements to seperate "ActivityQueries" class.
- Removed old 'addForEntity' activity method to limit activity record
points.
- Also removed some old view service references.
- Updated TopFavourites query to be based on favourites table and join
in the views instead of the other way around, so that favourites still
show even if they have no views.
- Created BookChild class to share some page/chapter logic.
- Gave entities the power to generate their own permissions and slugs.
- Moved bits out of BaseController constructor since it was overly
sticky.
- Moved slug generation logic into its own class.
- Created a facade for permissions due to high use.
- Fixed failing test issues from last commits
