* added command line arg for launching ecs impl
* removed render system tests, was causing gl context issues in tests
* fixed all lint errors in d2systems
* removed d2common/d2scene, was not the right way to go.
* added components for animation, scale, main viewport, viewport filter
* added interface for scenes, which are extensions of akara.System
* BootStrap is now AppBootstrap, common to game clients and headless
server
* added generic BasicScene struct for common scene functionality
* added game object factory as a system, with single sprite factory
* added update counter system, shows how many times the world updates
per second
* integration test is now the game client test