- 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+
- all utilities are now wrapped in XLSX object
- codepage handling (h/t @xch89820)
- formula tag attributes (h/t @shaunthomas999)
- hyperlink support (h/t @sysarchitect, fixes#55)
- coverage test spinner (to prevent travis timeouts)
