BETA: Reworking ItemHolder, now there are 3 more alternatives.
	* ItemChanceHolder(int id, double chance).
	* ItemChanceHolder(int id, double chance, long count).
	* QuestItemHolder(int id, int chance).
	* QuestItemHolder(int id, int chance, long count).
	* UniqueItemHolder(int id, int objectId).
	* UniqueItemHolder(int id, int objectId, long count).
	* Reviewed by: Zoey76, UnAfraid, Nos, jurchiks
	

git-svn-id: http://svn.l2jserver.com/branches/unstable/L2J_Server_BETA@6238 d34dfa0f-f91c-0410-86dd-cf06f19dd0ad