- added selection of reference point
- added snapping when pasting
- some minor code refactoring
- disabled pasting between footprint and pcb editors due to model incompatibility
-Can paste items from board to module-editor (only module parts)
-Can paste entire modules just as copy
-Can copy items inside module-editor
Known limitations:
-Will crash if trying to paste a module containing module_text inside
the module editor ( dont know why, problem existed before )
-If copying things with strange layer names, the layer names will be
changed.