Add htop to brew packages
Improve way to use dotfiles for the root user (symlinking user -> root)

Refactor:
 * User File.dirname(__FILE__) instead of ENV[‘PWD’]

Add:
 * A sym_link_for_root method which would symlink files and whole
   directories from the user’s home directory to the roots. The whole
   directories are symlinked so that they can stay completely in sycn.
 * Additional comment which mentiones that the Rakefile should be only
   ran as non-sudo
 * Additiional comment which mentiones that the symlink for root should
   be ran last to ensure all the directories are created and completed
 * A symlinks_root task which symlinks files/directories from the user’s
   home to the root’s home

Remove:
 * Old checks for ENV[“SUDO”] as we don’t need them anymore, the
   Rakefile should only be ran as non-sudo