DBC: fixed mistake in loading creature model data. Causes problem with SMSG_MOVE_SET_COLLISION_HEIGHT because was setting width instead of height (bugged camera after mounting/dismounting)
Server/PacketIO: Update CMSG_VOID_SWAP_ITEM And Structure

To Complete Should Fix SMSG_VOID_ITEM_SWAP_RESPONSE
Server/PacketIO: Add CMSG_PET_ACTION Opcode And Structure
Merge pull request #433 from Zerixx/master

Core/Packet IO: SMSG_WHO, and CMSG_WHO updated structures and opcodes.
Merge pull request #422 from DrEhsan/master

Server/PacketIO: Update CMSG_VOID_SWAP_ITEM And Structure
Merge pull request #378 from Arcidev/master

DBC: fixed mistake in loading creature model data.
Core/PacketIO: Fixed an issue with learning Battle Pet Training.