Added step controls to game class.
	modified:   gamelogic/Game.cpp
	modified:   gamelogic/Game.hpp
	modified:   graphics/GlfwHandler.cpp
	modified:   graphics/bmp_utils.cpp
	modified:   logs/TestGame_log.txt
	modified:   makefile
	new file:   physics/Player.cpp
	modified:   physics/Player.hpp
Added flags for drawable objects

Drawable flags define basic interaction with the world.
Removed the "position" parameter from drawable constructors.