On the matter of the Git client, for Windows certainly is a good start, but as far as I am concerned, I would rather recommend SmartGit, as it is also free for open - source, also really easy to use, but multiplatform and much more powerful!
You should also add a simple README.md file (see the Markdown extension) with the content of your first forum post as a quick start.
For the license, I would recommend the widely used ‘MIT’ license ; it allows users to use your work freely, even in a commercial game product. That is what I always use. But then you could always look for other mode of distribution (if you what more restrictions for instance)
After that will permit you to make a nice Web page, starting with your readme content for example (see my Git Plugin)
Cheers!