Refactor actions

Added InUserInterfaceDimensionUnit-methods for all kind of look attributes to provide unified interfaces and separation from libgdx.

In other words: To make an object complete invisible, you don't set the alpha value per setAlpha(0.0f) anymore, but per setTransparency(100) or like you would in the ide.

Testrun: http://catrobatgw.ist.tugraz.at:8080/job/Catroid-custom-branch-no-emma-test/84/