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

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

Fix in fitting (chi2 normalization),  small refactoring and code cleanup in fitSuite and fit observers.

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

ISingleton, IFactory and IFunctionalTest base classes. TestFactory now use them. New arguments handling in main.

Also added necessary project files for using eclipse as IDE