onCreateResources():
         Now creates texture atlas (1024x1024) and adds texture regions (addAllTextureRegions()).

onActivityResult():
         Now adds respective sprite to the scene.
         Also keeps the last added sprite in previousSprite
                              - future possiblity of removing the previous sprite (removePreviousSprite())
                                 and/or disabling draggability of the previous sprite.

Assests were moved to assests/gfx - adjust code accordingly.