rubyforge.org down? try this workaround

### Problem Sometimes the evident doesn't work anymore

$ gem instal ultraviolet

ERROR:  http://gems.rubyforge.org/ does not appear to be a repository
ERROR:  could not find gem ultraviolet locally or in a repository

### Solution Most of the time, it's the http server being down. Rsync often keeps on working. So we can get the gems via rsync

$ rsync -av rsync://master.mirror.rubyforge.org/gems/* mylocaldir 
$ gem install -l