refs #3283, refs #2739, refs #3096
- Renames permissions which didn't follow bread
- Adds permissions for notifications, mail and tags
Still todo:
- wire up the new permissions where they are needed
- add permissions for roles
refs #2600, refs #2379
Refactoring fixtures to make permission management a little easier
- Separate fixtures into JSON file and split permissions fixtures from other fixtures
- make fixture migrations more robust by fetching objects, not relying on
ids and checking before adding
- changed owner fixture slightly to remove any confusion between the 'Owner' role and 'Ghost Owner' user.
- moved 003 fixture versions out of config into logic, possibly not a good
idea
- refactored permissions fixtures and added permissions_roles fixtures to
make it easier to read / add
