Working on scene
Added Signal class
Rewrote Scene system to get a more robust basis
Added SceneSystem class
working on the Graphics system
Added forwarding with std::forward
rewrote UniquePtr creations using MakeUnique
DebugRenderSystem2D to draw axis of renderables
Fixed constructor arguments switch..........
Working basic scene system for rendering
Basig pong
Improved pong
Merge branch 'master' of https://github.com/RafBill/SupremacyEngine
Merge branch 'Scene'