API break (well, kind of...)

API break (well, kind of...)

 * evas_engine_info_set() returns now an int, to inform if
   an error occured or not when setting the info of the engine.
 * in the Evas_Func structure, the setup() method returns an int
 * all the engines are updated

I'll fix ecore_evas and ewl later (the compilation is still fine).

Gustavo: should I add EINA_WARN_UNUSED_RESULT at the end of the
evas_engine_info_set() function ?

git-svn-id: http://svn.enlightenment.org/svn/e/trunk/evas@39670 7cbeb6ba-43b4-40fd-8cce-4c39aea84d33