Close #8: `rake clean` doesn't fail with nonexisting files
Check for commands existence before `compdef`ing them
Add a CoffeeScript plugin for vim
Close #10: create a ~/.ssh directory in the :filesystem task
Add the oh-my-zsh osx plugin
Close #12: links.yml is not config.yml, Rakefile way more neat
Close #9: check that tmux version is >1.9, otherwise don't start it
Close #13: replace IP with pwd in the tmux status bar
Close #11: refactor installations, duplicate them in the Rakefile