GitLab

- merged test repo with xls
- travis integration
- shifted to Apache 2.0 LICENSE
- mocha tests

The shift to Apache 2.0 was long overdue.  It's becoming clear that compliance
requires deeper integration with the xls libraries and other implementations
whose specifications are covered under the OSP.  It was a grave oversight for
the ISO and ECMA people to not try to implement parsers themselves, for if they
did I suspect the outcome would have been much different