Server/PacketIO: Updated CMSG/SMSG_LIST_INVENTORY structures and opcodes.
Corrected a few build version comments.
Server/PacketIO: Updated CMSG_BUY_ITEM structure and opcode.
Server/PacketIO: Updated SMSG_SELL_ITEM structure and opcode.
Merge pull request #4 from ProjectSkyfire/master

	Server/PacketIO: Updated CMSG/SMSG_LIST_INVENTORY structures and opco…