#49 fixing room specification after latest changes
- also removing isNewRaspi from the light trigger since it is not needed
  anymore
 #36 refactoring of the model
- Room and Outdoor are sources from now on, renamed security source to
  Camera to only hold the camera enumeration
- new source resolver used in security DAO to lookup source by name
- room specification is no longer a source, so substituting everywhere
  with the room directly
- new space for future windows directly attached to rooms, reed switch
  is a simple GPioSwitch