make models for partnersSearch screen and brake partner selection from the map

btw
- move jses not handled by rjs to globallibs
- add new observables for set (observableSet.coffee)
  and for sorted and filtered content (sorted.coffee)
- add nested models, so now we can tranlate json with nested
  models to kvm with included references (can't save them)
- send json with nested stuff right from postgres in GeoWithin
  proc, so no need with any join -> kvm translation any more