Feature Request: Support skeleton directory (useradd -k) in user module

When I create a system account for a Apache virtual host it would be nice to create this user with a special skeleton. 

For example:

    - name: ensure vhost users are present
      user:
        name: {{ item['user'] }}
        home: /var/www/{{ item['host'] }}
        skeleton: /etc/wwwskel
        password: {{ item['password'] }}
        shell: {{ item['shell'] }}
      with_items: vhosts

Otherwise I need 4 actions to create /var/www/{{ item['host'] }}/{conf,logs,php-fcgi,www}