The optional ODS module has been completely merged into xlsx.js and the
corresponding scripts have been removed. The new xlsx.js file provides
appropriate ODS exports, so fixing is a matter of removing ods.js refs.
- codepage updated to 1.6.0 (latest)
- clean up Makefile
- adapted .travis.yml to support 0.8
- removed test files that drifted from baseline
- removed XLSB pseudo-inverse tests due to fails in node 4+