Trying to fix the build by requiring the Darkfish-Rdoc gem.

Checkpoint commit.

* Added rdoc-generation to the cruise task and the artifacts that get saved * Added Darkfish external and fixed up the RDoc generation task to use it * Factored out the config-file reading from #owner into a generic config reader, and then added some methods to access config values * Fixed the message-file sort block * Added a DRb service daemon: Ezmlm::ListDaemon

Added more archive-related functions: - Fetch the last post to the list - Fetch date/author/subject of the last post to the list - Fetch message count