Elementary support for EWS, with simplistic window manager.

Elementary support for EWS, with simplistic window manager.

This contains a very simple and stupid window manager to be used in
FB, PS3 or similar single-window engines. Everybody is welcome to
improve it, particularly:
 * Edje: better border decoration theme
 * Edje: nice background
 * C + Edje: taskbar with minimized items.
 * C + Edje: find a better protocol to determine window size,
   accounting border decoration without account shadow! Right now I'm
   taking everything :-P
 * C: window management keys (Alt+F4 and like)

How to use: export ELM_ENGINE=ews
How to configure backing store: export ECORE_EVAS_EWS=engine:x:y:w:h:options
Example:
{{{
export ECORE_EVAS_EWS=software_x11:0:0:1024:768
export ELM_ENGINE=ews
elementary_test
}}}

Bugs: maybe many, but so far seems it wouldn't take mouse events for
secondary windows. Will check it later.

git-svn-id: svn+ssh://svn.enlightenment.org/var/svn/e/trunk/elementary@63849 7cbeb6ba-43b4-40fd-8cce-4c39aea84d33