* add shutdown function to properly shut down the graphic system

 * add shutdown function to properly shut down the graphic system
 * fix seg fault with the xcb (soft and render) engines

Notes:
 * install fontconfig >= 2.7: it frees correctly its mem
 * strangely, the xrender xlib and gl xlib engines are
   segfaulting when XCloseDisplay is called (in the shutdown
   function). It does not with soft xlib. I absolutely don't
   know why.

git-svn-id: svn+ssh://svn.enlightenment.org/var/svn/e/trunk/expedite@43373 7cbeb6ba-43b4-40fd-8cce-4c39aea84d33