Added a PropertyHelper test suite: int, float and double testing for now
Added a PropertyHelper test suite: int, float and double testing for now

ruleless/CEGUI,OpenTechEngine/CEGUI,OpenTechEngine/CEGUI,ruleless/CEGUI,ruleless/CEGUI,OpenTechEngine/CEGUI,OpenTechEngine/CEGUI,ruleless/CEGUI