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

Added 2d vector called worldMatrix to the World, it will read an entire line and then push the vector into the matrix

Changed images to simple colours, stopped bullets being destroyed because I changed offScreen to onScreen... duhh

Changed all files to PNG, now stores w and h in entity, deletes bullets off screen, some boundries on pl ayer movement

Changed the way sprites work, they're now loaded in a static class and called by each child of entity

Added bullets to the game and passed reference to the player, also fixed build errors with the Keyboard::space