Remapped a command to avoid clashing with tmux.
Configured colours for grep matches.
Tried some improvements for bash prompt management.

Moved the prompt configuration in dedicated file.
Changed prompt colour between normal user and super user. Now when you're root
username and hostname turn red.
A few comments here and there.
Initial import of bash-git-prompt subtree
Updated vimerl submodule
Renamed 256 colours bash prompt
Merged update in gitprompt.
Changed color for command history number.
Corrected typo in environment variable name for grep colours.
Updated bash git prompt.
Updated bash git prompt.
Updated bash git prompt.
Updated bash git prompt.
Improved colours of prompt history command number.
Enabled bash completion both for Mac and Linux.
Refactored functions in dedicated file.
Enable bash git prompt.
Added .gitignore.