add brew-cask plugin
Add new brew cask commands
Merge pull request #1 from KevinBongart/brew-cask

Add new brew cask commands
brew-cask plugin: use spaces instead of tabs
Merge pull request #2329 from pstadler/brew-cask

add brew-cask plugin
Merge branch 'master' of https://github.com/robbyrussell/oh-my-zsh