github repos moved / intro to git

I renamed my GitHub account to openshiftninja (sadly, osninja already taken) for consistency.

http://github.com/openshiftninja

There aren't many public repos, but I do have some Docker tools, the source to my git intro, a mesos/marathon compose file, and a tweak to Anchore's scanning engine

In case you are wanting to learn git, here is a special plug for my guide which I published on read-the-docs:

http://git-intro.readthedocs.io/