Make a central git repo

[samking]

We should make it easy for people to use the git repo. Right now, only people with root access on the ctc.org can commit, which also means that all commits are done as root.

If we wanted to commit to never putting any secure information into the repo, we could keep everything in this public github repo. If we might want to commit secure information, we could host it on the ctc server, and we could associate each repo with the central one.