Source code migrated to GitHub

Well I finally moved the code to GitHub. Mostly because it allows other users to contribute to the project easier and also because of its more advanced integrations for automated build services.

I did have to re-write the commit's from the old SourceForge usernames to standard email addresses so all previous commits are linked to the same user on GitHub.

You can find the new code repository here:
https://github.com/OpenNOP/opennop