Created dummy classes
Implemented forum classes a bit more
Create ServerLink object and helper classes to it
Integrated ServerLink into app
Merged server-link branch into forums branch
Started implementing Categories in ServerLink
Added some more stuff to server link
Merge branch 'forums'

* forums:
  Added some more stuff to server link
  Started implementing Categories in ServerLink
  Integrated ServerLink into app
  Create ServerLink object and helper classes to it
  Implemented forum classes a bit more
  Created dummy classes