Enable agent forwarding
Shortcuts for accessing internal servers
Update oh-my-zsh
Disable auto-update check

Mostly just made me typo wrong stuff when opening a terminal.
Enable completion warning dots

It's nice to know that the shell is doing work instead of ssh latency
eating your keystrokes.
Add a basic script to initialize git submodule subrepositories

In the future it'll do more useful stuff, and maybe add a check in the
rc sequence to make sure it's run if hasn't been run yet.
Add zsh-syntax-highlighting to the plugin list
Enable extra hilighters