Add Homebrew Cask and some config
Add Homebrew Cask and some config

Here are the apps that I use that I was able to see existing casks for
for Homebrew Cask (http://caskroom.io/). There are some apps for which
casks exist -- eg kindle, skitch etc -- but I didn't add them to my
`Brewfile` because I can already get them easily enough from the Mac App
Store (which remembers my previous purchases/downloads).

wincent/wincent,wincent/wincent,wincent/wincent,wincent/wincent,wincent/wincent,wincent/wincent,wincent/wincent,wincent/wincent