added package com.l2jserver.gameserver.model.actor.group
switch Abstracty playerGroup to interface
Merge branch 'master' into model_actor_group

Conflicts:
	.classpath
	.settings/org.eclipse.jdt.core.prefs
	java/com/l2jserver/gameserver/model/AbstractPlayerGroup.java
	java/com/l2jserver/gameserver/model/L2CommandChannel.java
	java/com/l2jserver/gameserver/model/L2Party.java
	java/com/l2jserver/gameserver/model/actor/L2Attackable.java
	java/com/l2jserver/gameserver/model/actor/L2Character.java
	java/com/l2jserver/gameserver/model/actor/L2Summon.java
	java/com/l2jserver/gameserver/model/actor/instance/L2PcInstance.java
	java/com/l2jserver/gameserver/model/olympiad/AbstractOlympiadGame.java
	java/com/l2jserver/gameserver/model/quest/Quest.java
	java/com/l2jserver/gameserver/network/clientpackets/RequestJoinParty.java
	java/com/l2jserver/gameserver/network/clientpackets/RequestPartyLootModification.java
warning cleanup
another warning cleanup
Let L2PCInstance implement AbstractPlayerGroup
Merge branch 'model_actor_group' into addon_pack