* refactored Effect import (class UberShader is now removed, which is now completely done by Effect::Builder class)
 * added new DLL-Project GEARPhysics as a dummy project for creating a dll extension -> implements a PhysicsSystem and PhysicsComponent
 * adjusted Test project to use and link against new dummy dll project
 * removed deprecated Light class
 * fixed issue in default shader for point lights (did not calculate attenuation)