Half way through knobs revamp
Disconnected node gui/core by adding NodeInstance class. It is acting as a controler for a particular node
Disconnected knob/knobGui code
Improved plugin loader a lot.
Disconnected most of the engine from the gui.
Removed NodeInstance/KnobInstance
Fixed TabKnobs/GroupKnobs
Moved all the plugins stuff to AppManager to avoid duplicate resources for several instances of the software.
Changed OfxParams so the value is stored directly into knobs
Fixed conflicts
Fixed conflicts