- 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)
- cellHTML controls HTML generation
- cellFormula controls formula output
- sheetStubs now defaults to false
- cleaned up unnecessary CSV quotes (fixed#45)
- updated test_files to 20140211
- updated SSF to 0.5.7
- removed unused main function
- removed some dead code