Bring CrossTeX up-to-date with latest changes

 - Adds additional unicode characters
 - Allow a book to have an address comprised of a location, country, or state.
 - Fix a bug with short-form authors.  'egs and rescrv' expands to the full authors' names.
 - Introduce "@cite" syntax.  This allows you to create an xtx file with an implicit set of citations that doesn't include every publication ever cited.