Changes prompted from work laptop

* Use highlighted parentheses in Emacs
* Use Kaleidoscope as the git diff editor
* Add an alias for prettifying JSON; Make sure you install yajl
* TODO: How do you install tools via brew automatically based on
  some package file? i.e. Emacs' init file to install packages every
  time you open Emacs and those packages are not installed
* Started work on the Rakefile to be able to manually choose your
  configurations