Map pixels to real world distances

[TheSherlockHomie]

Map the pixels on the screen to real world metres.

Also reset the coefficient tweaks to normal

[TheSherlockHomie]

Instead of calculating physics based on pixels, calculate physics based off of internally set values (such as the arena being 1m * 1m, instead of however many pixels of the window) and then running everything through a translation layer (which converts 1m to pixels) before rendering