Updates to 18019

Signed-off-by: Sovak <Sovak007@gmail.com>
Server/PacketIO: Added opcode CMSG_AREATRIGGER for 5.4.7.
* Fixed ghost & death
* Fixed some fields in char enum

Signed-off-by: Sovak <Sovak007@gmail.com>
Server/PacketIO: Updated CMSG/SMSG_GROUP_INVITE structures and opcodes.
Server/PacketIO: Updated SMSG_PARTY_COMMAND_RESULT opcode.
Server/PacketIO: Updated CMSG_GROUP_INVITE_RESPONSE structure and opcode.
Server/PacketIO: Updated SMSG_GROUP_DECLINE opcode.
Server/PacketIO: Updated SMSG_GROUP_LIST structure and opcode.
Server/PacketIO: Updated SMSG_GROUP_DESTROYED opcode.
Server/PacketIO: Added CMSG/SMSG_RANDOM_ROLL structures and opcodes.
Server/PacketIO: Added CMSG/SMSG_MINIMAP_PING structures and opcodes.
Merge pull request #11 from ProjectSkyfire/master

Updates to 18019