An awesome fish prompt

If you use fish and want to try Powerline:

Install oh-my-fish https://github.com/oh-my-fish/oh-my-fish
Install bobthefish (for the git support)

Follow the instructions above, or:
1. Install fisherman (https://github.com/fisherman/fisherman)
2. Install powerline with `sudo pip install powerline-status` (or https://github.com/banga/powerline-shell not sure about the diff)
3. Install shellder with `sudo fisher install simnalamburt/shellder` (https://github.com/simnalamburt/shellder)
4. Install powerline-patched fonts (https://github.com/powerline/fonts)

Enjoy a better prompt [1]


[1] Actually the prompt acts a bit weird if you press <TAB> (autocomplete) one too many times. I am not sure why.