oxo3dwasm: create by converting oxo3dweb

Add LICENSE and README.md

oxo3dweb: add some help and a button to show it

oxo3dweb: implement orientation switcher

oxo3dweb: make mobile friendly and tidy controls

Implement oxo3dweb using gopherjs

Put into github.com/ncw/oxo3d heirachy and prepare separate concerns more

Add missing files to repo

Make a registry of Players and make the tournament use them

Add Play() to Player interface to fix evaluation not being updated

Fix evaluation to make it symmetrical for you and me

Move constants to correct place

Parallelise the tournament

Implement tournament

Factor oxo3d into a package and the players into their own files