Core/PacketsIO: Implemented or updated most of party related packets.

Packets updated or implemented :
- SMSG_INSTANCE_INFO : updated

- CMSG_SAVE_CUF_PROFILES : updated
- SMSG_LOAD_CUF_PROFILES : updated

- SMSG_PARTY_COMMAND_RESULT : updated

- CMSG_PARTY_INVITE : updated
- SMSG_PARTY_INVITE : updated
- CMSG_PARTY_INVITE_RESPONSE : updated
- CMSG_PARTY_UNINVITE : updated
- SMSG_GROUP_UNINVITE : updated
- CMSG_LEAVE_GROUP : updated
- SMSG_GROUP_DECLINE : updated

- SMSG_GROUP_DESTROYED : updated

- CMSG_MINIMAP_PING : updated
- SMSG_MINIMAP_PING : updated

- CMSG_CONVERT_RAID : updated
- CMSG_SET_EVERYONE_IS_ASSISTANT

- CMSG_DO_READY_CHECK : updated
- CMSG_READY_CHECK_RESPONSE : updated
- SMSG_READY_CHECK_COMPLETED : updated
- SMSG_READY_CHECK_RESPONSE : updated
- SMSG_READY_CHECK_STARTED : updated

- CMSG_REQUEST_PARTY_JOIN_UPDATES : implemented (source : sniffs)
- CMSG_REQUEST_PARTY_MEMBER_STATE : updated
- SMSG_PARTY_MEMBER_STATE : updated
- SMSG_PARTY_UPDATE : updated

- CMSG_REQUEST_RAID_INFO : updated

- CMSG_INITIATE_ROLE_POLL : updated
- SMSG_ROLE_POLL_INFORM : updated
- CMSG_SET_ROLE : updated
- SMSG_ROLE_CHANGED_INFORM : updated

- CMSG_CHANGE_SUB_GROUP : updated
- CMSG_SWAP_SUB_GROUPS : implemented

- CMSG_SET_ASSISTANT_LEADER : updated
- CMSG_SET_PARTY_LEADER : updated
- SMSG_GROUP_NEW_LEADER : updated

- CMSG_CLEAR_RAID_MARKER : implemented
- SMSG_RAID_MARKERS_CHANGED : implemented

- CMSG_UPDATE_RAID_TARGET : updated
- SMSG_SEND_RAID_TARGET_UPDATE_ALL : updated
- SMSG_SEND_RAID_TARGET_UPDATE_SINGLE : updated

- CMSG_OPT_OUT_OF_LOOT : updated
- CMSG_SET_LOOT_METHOD : updated

About group update flags:
- Not sure they are use for now.
- Pets now have their group update flags.
- Pets'power is no send to client anymore.
- Changes about them are inspired from SMSG_PARTY_MEMBER_STATS parsing of WowPacketParser, but it seems this packet is not use anymore.

CHAT_MSG_RAID has been fixed.

About Ready check:
- Correctly implemented this function.
- An update function has been added to Group class, and to GroupMgr class in order to manage the ready check expiration (when 35 seconds were gone, players who have not answered must be reported as AFK)

About Raid markers:
- Old spell effect SPELL_EFFECT_SUMMON_OBJECT_SLOT3 has been renamed to SPELL_EFFECT_CHANGE_RAID_MARKER and implemented. I'm sure about that because raid markers spells are the only spells that have this effect type.

Source: WowPacketParser, and sniffs from official.

src/server/game/Groups/GroupMgr.cpp

@@ -233,3 +233,10 @@ void GroupMgr::LoadGroups()
         TC_LOG_INFO("server.loading", ">> Loaded %u group-instance saves in %u ms", count, GetMSTimeDiffToNow(oldMSTime));
     }
 }
+
+void GroupMgr::Update(uint32 diff)
+{
+    for (GroupContainer::iterator itr = GroupStore.begin(); itr != GroupStore.end(); itr++)
+        if (itr->second)
+            itr->second->Update(diff);
+}