Add oh-my-zsh as submodule and source it in zshrc/oh-my-zsh.zsh
Remove bashrc directory and symlinks to it. Not used anymore.
Add main zsh file and change how it is sourced in zshrc. Move away from the src magic.
Move extract function into its own bin file.
Add pure theme by Sindre Sørhus, modify it a bit.
Remove unneeded code. All of this is bundled in oh-my-zsh.
Add str binary for opening sourcetree with the correct path.