- xlsx bin script takes `-8, --xls` options for writing BIFF8
- updated CFB to 0.12.1, CRC32 to 1.1.1
- test file spelling error (h/t @jsoref)
- minified script renames write_shift / read_shift
- UTF8 and XML entity processing

Issues:
- fixes #815 h/t @Neroth
- fixes #739 h/t @LittleBreak @PWDream
- fixes #553 h/t @keyiis
- fixes #492 h/t @FlyingSailor @simonchan2013