Require servlet and filter names.

This edges DW even closer to the Servlet 3 API.
Upgrade to Jetty 9.0.4.
Upgrade to Liquidbase 3.

Removed the "dump" command until someone cares.
Fix example config.
Upgraded Freemarker.
Upgraded Mustache.
Revert "Upgrade to Liquidbase 3."

This reverts commit e38ff426c54abaf714ac58edc2f31d0a53c96d92.