Change-Id: I8bad02b26a20636e4fc3d1f0ab0a16f0bacc7bf1

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

Change-Id: I0ea81f6c45748af3130721b8f8a7244eac9787fc

Change-Id: I21b0daf0550dcc2f12f1712e7b7cf519358a7a1d

Change-Id: I5ff18b2768095fb14e7fbece2e756115829abbde

Change-Id: I9bb2cc0cbfac9841b13bed15a474fefb24355cd4

Change-Id: I8e0479b632af3b5ca809aacf955e4be96822ac2c

Change-Id: If3f30af2ed250968e65cde58bd413213f4d384b1

Change-Id: Ia4c9536282af6df3d9d462946dec1d8112459242

Change-Id: I82ef161c6b6956c7b83cd4a1c37627beac6ea75b

Change-Id: I11eb50ba1ef0bef8ac47bf6f7b17e0f79ecd3f2d

Change-Id: I94d4f6146c79541bf8a36e4c3dca1842e46cddd5

Add the commons-io library explicitly to the depencencies.
It was already present as a transitive dependency but is now used in code.
Using the version 2.2 as that got so far already packaged in ext.

Add a new class, HtpasswdUserService, which performs authentication
against a text file created with the Apache 'htpasswd' program.

Added dependency on commons-codec:1.7

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.