I don't keep this in ~/.oh-my-zsh. It seems wrong to keep it there. So
source all my oh-my-zsh customizations from the spot where I like my
source code to live: ~/code.
Lets me keep my zshrc file in sync between different machines.
To deploy:
ln -s ~/code/oh-my-zsh/my.zshrc ~/.zshrc
If oh-my-zsh every gets tricksy with it's .zshrc templating and
functions I'll have to rethink this approach.