brew: switch rbenv to --HEAD
npmrc: remove prefix, seems to be causing conflicts with Homebrew
gem: install bundler (how did I not have that already?!?)
Merge branch 'master' of github.com:phette23/dotconfig

* 'master' of github.com:phette23/dotconfig:
  brew: install nvm
  npmrc: prefix causes problems with Homebrew's Node
  brew: install archey
  cask: fix 2 cask names, st3 install now symlinks subl by itself
  brew & cask: add Fish, fix mistakes from last commit
  brew & cask: let's be a little nicer & more useful if we forgot to install Homebrew…