Add deps to install Powerline patched Menlo font
user
```ruby
class FontMenloPowerline < Cask
  url 'https://gist.github.com/raw/1627888/c4e92f81f7956d4ceaee11b5a7b4c445f786dd90/Menlo-ForPowerline.ttc.zip'
  homepage 'https://powerline.readthedocs.org/en/latest/fontpatching.html'
  version '6.1d8e1'
  sha1 '9b317e7597c8acd5de2991175223eeb5cf694fde'
  font 'Menlo-ForPowerline.ttc'
end
```
assistant