MetaNAC: Initial implementation of a game of Meta Noughts and Crosses

Known bugs:
- Winners are set prematurely
- Game never ends
LHArchive: Added README file
Miscellaneous README updates

- Added LH Archive to master README
- Renamed markdown files in the balls and intersection directories to
README.md so that they appear automatically on GitHub
PushIt: Added MIT license
Merge branch 'LHArchiver' into master