All sample preprocessing moved to component Resample/
- Renamed IFormFactor -> IReParticle, etc.
- Moved computation of sliced forms from FormFactorXX to function sliceFormFactor in Slicer.cpp.
- Component Resample no longer depends on component Param.
- Processed data structures no longer exposed to Swig.
- Renamed sample getter from getLength() to length(), etc.