Completed creation of mess form factor that supports polarized calculations; refactor: remove spaces before public, protected, private

Insert new header comment block, remove old one, manually improve file comments (defines / implements), change brief function description to doxygen format, remove some outcommented code

Multiple changes to let Isgisaxs9-like samples to register properly they components in parameter pool

Refactored decorator classes, added Experiment, Beam and Detector classes and added prototype pattern to many classes (clone() function)

Added draft of low level objects for representing scattering data (enabling variable dimensionality)