[evas] Documenting more functions on Evas objects:

[evas] Documenting more functions on Evas objects:

     - evas_object_event_callback_add
     - evas_object_event_callback_del_full
     - evas_object_focus_get
     - evas_object_focus_set
     - evas_object_key_grab
     - evas_object_key_ungrab
     - evas_object_pass_events_get
     - evas_object_pass_events_set
     - evas_object_precise_is_inside_get
     - evas_object_precise_is_inside_set
     - evas_object_propagate_events_get
     - evas_object_propagate_events_set
     - evas_object_repeat_events_get
     - evas_object_repeat_events_set

    Examples on them also follow.

git-svn-id: svn+ssh://svn.enlightenment.org/var/svn/e/trunk/evas@60769 7cbeb6ba-43b4-40fd-8cce-4c39aea84d33