Remove the cloud-image MOTD junk (not owned by any package)
Install the protected_attributes gem
Move versions into versions.sh
Use updated chruby, add ruby-install tag

Still using @railsbridge-boston forks since there haven't been new
versions tagged. Remember to change the archive URLs to upstream later.
Bump Rails version to 4.0.9
Remove Python-Twisted dependencies (manually, not properly installed for autoremove)