Added a su back since the oh-my-zsh script needs to run as the user it's going to be installed for.
Removed sudo since the script is run with a Packer override that has sudo in it.
Removed redundant tmux attach-session aliases from the .zshrc files for vagrant and root.
Added installation of rake so we can install Vim Janus later on; --no-install-recommends so we don't get a ton of other packages that will take up space.
Added another apt cleanup command.
Added a script that installs Vim Janus and removes the git repo history.