cleanup the install script
add check to see if rvm script exists and is readable
add TODO for ssh_configure_host
add better loading of rvm
change git email address
Merge branch 'master' of github.com:Dextro/dotfiles

* 'master' of github.com:Dextro/dotfiles:
  add config setting to add github.ncube.be to hub, a command-line wrapper for git (http://defunkt.io/hub/)