- last commit to implement miltiview feature directly into the controller.
- now we try to implement a multiviewskinfactory.

let's see which does work better...
some steps into multiviewskinfactory direction implemented
almost compilable again: connection methods still missing
workflow package compiles again, fx package needs some work before we can test the multiview feature
all packages compile again. still lots of stuff to do: getNodeById stuff does not fully work
hierarchy works again! multimap implementation was broken.
connections work again, nested connections still have errors due to nullptr-exception
if node is removed, connections remove correctly
connections in subfactories work again
multiview works!!! tested with minimap
multiview works!!! addSkinFactories ande setSkinFactories do work, except nested connections (they reference the wrong fx node)
multiviews even work for subsubflows: they can have their own skinfactories!!! 

still todo: nested connections (they reference the wrong fx node)
connetction bug partially fixed (does not work for nested views)
multiview fully working! nested views work as wll as parallel views!