Added StimPack.cpp and changed ALL positions passed throughout the program are now vectors, no float x,y

WorldMatrix is now made up of Tiles, this means that you can change the state/damage on individual world ties

Rework of visible entitytity system, it's now stored in the Entity.cpp and nothing will happen if it's not set to true

Major rework of Sprite.cpp, all textures are now loaded through Texture:: and tiles and sprites are seperated

Finally fixed the damn grabscreen() error, it was caused by drawing in the update loop. Also added tile files for tile class

The world now loads only when it's needed and a copy is made of the screen. This is much more effcient