OrbitCamera: added getters (public). Setters moved from `protected` to `public
: Improved API. Instead of using "out" parameters for getters, it returns a `kmVec3`
: Setters receives `kmVec3` as well. Old API is still supported
Node: `setAdditionalTransform` doesn't get `dirty` on the next frame.
Instead, once the additional transform is set, in order to remove it the user needs to pass
the identity matrix
Improves SpriteTest.
It is easier to see if Sprite works as SpriteBatchNode (and vice-versa).
Needed for the new renderer.
Also adds `const` to title() and subtitle()
Base class displays the Menu( <- O -> )
Improved in some tests the way to create entries.
Instead of defining the tests twice: the "create" method, and the entry
in the array, it is only needed in the array (ActionsTest, SpriteTest
and Texture2DTest)