switch over to scenemanagment system and new (old) camera class. this lets us zoom in and out, easily translate, draw text(soon!) and other fancy stuff!
update variable names to match naming conventions (though they change all the time, is there much point?)
needs it so bad
refactor out magic number into scale delta variable
controls how fast the scale is adjusted when using the mousewheel/pg up and pg down keys
no code change, just aesthetics