Jetty 7.4.4 introduces a fix to correct url generation. Unfortunately,
this "fix" creates a bug for resolving the root page. Evidently the bug
may really be in Wicket.

Wicket Bug: WICKET-3841
Eclipse Bug: 351199

* Build script overhaul including building & publishing GO, WAR, Docs,
and Site.
* Restored JGit 0.12.1 dependency and backported Blame.  Got tired of
waiting for JGit 1.0.0 Maven artifacts.
* Changed Summary Page layout
* Optional cookie authentication
* Added icons for log, tags, and branches panels.
* Show last commit author and short message on branches panel.
* Unit testing.
* Documentation.

The JGit team is now publishing 0.12.1 artifacts on the Eclipse Maven
site. Yeah! That was the last missing piece for a slick Git:Blit
deployment. The build has been reworked to download from Eclipse and
to also download source and javadoc jars for setting up a development
environment.

Made the log4j pattern configurable by operating system.
Moved Markdown utils to their own class since I need StringUtils for
Build and that introduced a chicken-and-egg scenario.

This seems to improve page loading times.

Change-Id: Ifce000c85c8947c3a768e782c841e41a8953d314