Ability to add repositories on the fly

[MatthewFellows]

It would be useful to have the ability to add a new repository from the user interface and without having to restart codebrag after doing so...

Just a git clone URL entry box and an import button, then it runs git clone with that URL from the repos folder and knows to do the import process immediately. The next refresh or page load after a completed import, will show the new repository in the repo selector.

We'd like to use this as a central code review tool, but having the system bouncing up and down every time someone adds a new repository, is not viable unfortunately.

I'm digging out the Scala tutorials, so I can contribute this, but hopefully someone will get there and add this before I work out how to write Scala ;)