* F-Modifier API is now in its own file in blenkernel
* Renamed and refactored these so that they're no dependent on F-Curves, since all they really used was the fcu->modifiers list
* Added missing license blocks to a few files
For now, some of these polls may be a bit too restrictive, but at least we have some unified+cleaned bases to work from now (instead of relying on the generic ED_operator_area_active).
