Imported the reference implementation contributed by syntevo which
is used in their SmartGit product.  You may create a bugtraq config
section inf your .git/config file OR you may add a .gitbugtraq file
to the root of your repository.

Example:

    [bugtraq "issues"]
        url = http://code.google.com/p/gitblit/issues/detail?id=%BUGID%
        logRegex = "[Ii]ssue[-#:\\s]{1}\\d+"
        logRegex1 = "\\d+"
    [bugtraq "[pullrequests"]
        url = "https://github.com/gitblit/gitblit/pull/%BUGID%"
        logRegex = "(?:pull request|pull|pr)\\s*[-#]?([0-9]+)"

Change-Id: Iaba305bf4280d08cc4d1abf533c2f1365470a43f

This is the first step towards modularization and injection.  All
direct references to the GitBlit singleton within the Wicket pages
and panels have been replaced to proxy methods in the GitBlitWebApp
singleton.  There are still two Wicket classes which rely on the
GitBlit singleton; those require manual instantiation (servlet 3).

Change-Id: I0cdbbcf87959d590c446c99abb09c07c87c737bc

Change-Id: Ifc878cb59fe66674e6dfdc6d233fa26be1f4d605

Change-Id: I9f91138b20219be6e3c4b28251487df262bff6cc

Change-Id: I8f26746a611e9ab955efe8b2597cc81db48fb085

This feature was incomplete, reported incorrect information, and has
been replaced by the compare page (issue-75).

This is a massive commit which reorganizes the entire project structure
(although it is still monolithic), removes the Build classes, and
switches to Moxie, a smarter Ant build tookit based on the original
Gitblit Build classes.

The Ant build script will likely require additional fine-tuning, but
this is big step forward.

To see a diff between two branches use the syntax:
<host>/commitdiff/myRepo/branch1..branch2

If an object id was not specified Gitblit used HEAD to perform the
operation.  This breaks under some conditions like working with a
repository that does not have any commits on master but does have
commits on a vcs-import branch.

The new approach is to centralize the resolution of unspecified object
ids to a common method which resolves HEAD first but uses the most
recently modified branch if HEAD points to nothing.

This commit also includes a non-functional method for creating an empty
branch. I couldn't figure out how to make JGit create an orphaned
branch.

Also fixed /dev/null reference due to deletion change.