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

Mucked around a bit with the states, only got the State class version of the tick and render to be called

Added a program state system, MenuState and GameState inherit from State which holds a static current State. Render and ticks are called from each state