And, link to the contributing guidelines from the Readme.

Since Google Plus doesn't exist any more...

Change-Id: I717e13d1f852a4adf50b547f4769dd62da2384ce

* 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.