Feature: Add Rubygems and NPM packages to the install script
Bugfix: Properly determine the MANPATH
Feature: Adjust ls aliases

Firstly, we want to make sure that directories are always listed first in the
listing.

Secondly, we want to remove the `.` and `..` entries when using 'la'.  We accomplish
this by using the `-A` flag instead of the `-a` flag.
Feature: Add git sample hooks to the gitignore