Shadows on/off @wip
Added moving circle
@wip shadow lines drawn
Moving shapes to own js files
util.js created
Shadows moved to rectangle, and called on .draw()
grunt.js added
No longer passing exports to shapes
Fixing jshint
adding more globals: player, enableShadows
abstracting rectangle.drawShadows()
Added illuminated.js lib to cast shadows, and draw lights.
Larger light radius
Showing shadows/light via illuminated.js lib https://github.com/gre/illuminated.js
Removed player angle text