Handle HTML5, Release Package, Useful Docs, Utility Scripts

Adds support for HTML5 as input as well as the beginnings of DITA-specific HTML-to-DOCX support.

Created a real release package with an Ant script to make running Wordinator from the command line or from OxygenXML easier.

Report command-line usage info when command line parameters are not correct.

No functional change to the DOCX generation itself.