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

  a result; ideally it should not at all change the internal state;
  definitely it should not store the result.
Comments, layout.

This reverts commit e202d1ef.

Status: FitTest02 fails.

- 3rd person form: "Does" this or that.
- For all const methods that return something: "Returns" ...
- For boolean return value: "Returns true if " ...

manual editing of @brief ("defines ...", "implements ..."), removed multiple white lines

Refactoring in ChiSquaredModule and FitSuiteObjects to have isgisaxs like chi module, unit test for chi module

N of free parameters in ChiModule, scale for max intensity in FitObjects, more tests in TestIsGISAXS12

Moved to usage of IChiSquaredModule interface (instead of concrete class pointers) + moved getChi2DifferenceMap from FitSuiteObserverDraw to IChiSquaredModule

TestFittingModule switched to new FitSuite, Observer pattern and new FittingHelper to follow fit iterations