Cask for macvim-kaoriya

This cask will install macvim-kaoriya.

$ brew tap delphinus/macvim-kaoriya
$ brew cask install macvim-kaoriya

# If you want to override the system Vim, use this instead.
$ brew cask install macvim-kaoriya-override

This cask existed in official repo caskroom/homebrew-versions.

ref: caskroom/homebrew-versions#3223