Merge pull request #1 from jlhosman/master

Many updates and addtions
Merge pull request #2 from jlhosman/master

Adding handling for glossary, indexterm, link, more inline handling; Misc fixes to figure, table, title, part, and xref handling
Merge pull request #3 from jlhosman/master

Adding handling for footnotes
Merge pull request #4 from jlhosman/master

More development work
Update README.md