elementary: elm_genlist now use edje signal for even/odd state.

elementary: elm_genlist now use edje signal for even/odd state.

NOTE: if you want to implement even/odd in your theme you know
need to listen to both signal :
	- elm,state,odd from elm
	- elm,state,even from elm
If you set data of "stacking_even" to "above" of you item group
it will raise the even object above the odd one (that's the default
behaviour).
You could also explicitly active/deactivate the stacking by setting
data of "stacking" to "no". Default is "yes".

git-svn-id: svn+ssh://svn.enlightenment.org/var/svn/e/trunk/elementary@58822 7cbeb6ba-43b4-40fd-8cce-4c39aea84d33