Make "GitHub Repo URL" accept GIT urls as well as the "github project homepage URL"

[pmuir]

e.g. accept git@github.com:awestruct/awestruct.org.git and https://github.com/awestruct/awestruct.org.git as well as https://github.com/awestruct/awestruct.org

[LightGuard]

I have this done on the backend, but there are some front end pieces that need to be put in place first.