Add a few new recipes (finder and login screen).

This pull request adds a few new recipes:

* finder_show_path_bar - Shows the path bar at the bottom of finder windows
* finder_show_status_bar - Show the status bar at the bottom of finder windows (below the path bar) 
* use_name_and_password_on_loginscreen - Instead of showing icons for each user account on the login screen, requires the user to type in a full username and the password for that username in order to login.