also updated transform test cases.
Yet, this engine is not well optimized,
If they are too mch sluggish,
you can use ELM_FPS envrionment lowing down the fps
when you launch test cases...
ex) $ELM_FPS=30 ./testSceneTransform
Change-Id: I1871d5bedee010d5d6a3d877d95e257120796e8b
Each scene could conserve its own transformation,
the origin could be the parent Paint (if they were beloned to)
Thus, you can compose the multi-tranformed scene group which
simultenoulsly working in own spaces.
See testTransform and testSceneTransform, how they work.
Change-Id: I51deb4d66f8fcd024f8dc7a1e1af57c398a9d7fe
