[DEL] rb request handlers
[FTR] rb module init
[MIN] updated blueprints for new handler locations
[FTR] added sqlalchemy params into config
[FTR] added db init into flask app factory
[IMP] made base RH more flexible

- base RH doesn't pass params any more
  (_checkParams), uses flask.request
- moved room booking db mixin into its
  module for now but eventually will be
  removed completely
[REF] admin/index request handlers
temp