Rename OP_BuffFadeMsg to OP_ColoredText since it is a generic opcode
Add Client::SendColoredText(uint32 color, std::string message)

This will send a message (arbitrary size limit of 512) to the client
of the provided color. The MT colors should work here.
Fix function signature of Mob::IsRaidTarget() so its actually a virtual
Add raid mob message

"This creature would take an army to defeat!"
Colors may be a bit off due to differences in clients