samples/3D/ModelViewer: Improvements, Sample models
- Auto computing proper Z range and camera position based on model radius and bounding box
- Controls to shift up/down/left/right in addition to zomming in and out on the model
- Light now moving in world space
- Replaced sample model data with unrestricted use models:
		Spotty Cow -- http://www.cs.columbia.edu/~keenan/Projects/ModelRepository/
			Keenan Crane
		Duck -- http://www.sharecg.com/v/11989/browse/5/3D-Model/bathroom-little-ducks
			Martin Eloy Ocampos
- Including unrestricted use sky box
      Sky box -- http://quadropolis.us/node/3062
         Djakk
ide/ModelView: Synced latest improvements to 3D ModelViewer
- e.g. fixed various issues causing some models not to display
samples/3D/orbitWithMouse: Not defaulting to full-screen