Pixl.js cases

Just a thought in terms of printability - you could always take away the 'bridges' in TOP_PixlJsCase that are at the foot of the buttons and over the USB hole, and move them into BOT_PixlJsCase. Might make it print easier on the more useless printers :)

Thanks for the advice. I modified both parts accordingly.
https://github.com/yerpj/PixLcase/blob/master/BOT_PixlJsCase.STL
https://github.com/yerpj/PixLcase/blob/master/TOP_PixlJsCase.STL