Add some github repo pulling to dotfile deploy

* oh-my-zsh and bash-it as defaults for now
Use zsh or bash

* Move all the things around and make them work for either bash or zsh
* General flow is as such:
  ~/.(ba|z)shrc -->
  ~/.sh.d/(ba|z)sh-setup.sh -->
  ~/.sh.d/shell-init.sh and others that are common to either shell