Adding lists of tables, figures to chunked docs
Completing some AsciiDoc xrefs

Some TODOs remain in the AsciiDoc sources, particularly xrefs to the
graph configuration page and download page.
Disabling titan-dist's default-install & -deploy

These executions in titan-dist's pom just installed and deployed cruft
like the titan-dist pom itself and the set of integration test classes
used to verify the archives.  titan-dist still pushes its zip/tar.bz2
files to S3 using separate executions with distinct ids.
Extending DocBook Gremlin syntax highlighter

This creates several new highlighting classes, including gremlin-func,
repl-prompt, and repl-result.  The XSLTHL highlighter's Gremlin
configuration now recognizes substantially all of the functions at
gremlindocs.com.