Temporarily change the URLs to point to our bitbucket mirror.
Add a bash/zsh check in /etc/profile.d/chruby.sh (issue #56).

* This will ensure that dash will not error on loading chruby.sh.
Revert "Temporarily change the URLs to point to our bitbucket mirror."

This reverts commit 1a37d71450f955f3172a7faa1d8062e2f1eedeff.

* GitHub is back.
initial commit