Update config.fish

- remove help comment section
- improve colour of search terms in man pages
- fix less (by aliasing it) to work with escape sequences
- add another external IP alias
- force symlink creation and provide a better usage example
- add alias for showing all git status files (includes ignored)
Fix unrar command
Fix indentation
Update gitconfig

- Add diff-staged alias
- Add show-space alias
- Add abort-merge alias
- Add clean-untracked alias
- Add pu alias
Add git-clean function which removes untracked files
Move "filetype plugin indent" option to top of file
Add coffitivity script for coffeeshop sounds
Add fish_title function for improved window titles
Call git directly for improved speed

If you use hub, you'll have git aliased to hub, which creates a fish function.
This is very slow (try holding enter key in a git repo and notice the delay).
Calling git directly makes the prompt significantly faster.