Server/PacketIO: Updated CMSG_PET_NAME_QUERY opcode and structure.

Updated SMSG_PET_NAME_QUERY_RESPONSE opcode and structure.
Server/PacketIO: Updated SMSG_LEVELUP_INFO opcode and structure.
Merge pull request #21 from ProjectSkyfire/master

 	Server/PacketIO: Updated SMSG_LEVELUP_INFO opcode and structure.