Edje needs to detect files changed on disk before considering cache.

Edje needs to detect files changed on disk before considering cache.

If file changed on disc (mtime), then make the reference dangling so
it is not reused anymore on subsequent open. If it is in cache, just
free it as it is not useful anymore.

This solves the following problem:

     edje_object_file_set(ed, path, group);
     ecore_file_cp(new_gen_file, path);
     edje_object_file_set(ed, path, group); /* still uses the old one! */

By: Bruno Dilly <bdilly@profusion.mobi>

git-svn-id: http://svn.enlightenment.org/svn/e/trunk/edje@46548 7cbeb6ba-43b4-40fd-8cce-4c39aea84d33