[modules] Add new module to display git information
[modules] Add new module to display git information

This module uses xcwd to retrieve the directory of the currently focused
window and, if any of the parent directories is a git repository,
displays basic information about the repository.

Right now, only the current branch name is displayed.

tobi-wan-kenobi/bumblebee-status,tobi-wan-kenobi/bumblebee-status