From: Bluezery <ohpowel@gmail.com>

From: Bluezery <ohpowel@gmail.com>
Subject: [E-devel] [E-Devel][Patch][Elementary]Genlist - Edje Item
Cache Refactoring

This is patch for reconstructing genlist's item cache.
Each item cache functions do harsh jobs so just push,pop by
Elm_Gen_Item * now.
Before, cache is disabled by comments. But I enabled item cache again
(even for the case which tree_effect_enabled is on).

I changed some functions:
_item_cache_find() --> _item_cache_pop()
_item_cache_add() --> _item_cache_push()
_item_cache_zero() -->_item_cache_all_free()

And I removed _item_cache_clean() function because I made
_item_cache_push() to don't exceed the item_cache_max. So clean-up of
cache is not needed anymore.

SVN revision: 77944