Codea on the Mac

@jfperusse @sim @John - just bought a new metal iMac and am busy trying to adapt to the changes at the moment. One thing I have done though is download Codea to my kit.

Already posted about restricting the project window size (in discord) but I note that there are no demo projects in the package - could you include this so I can try them and try to find any issues with them.