Update chat colours

@madmaxoft, is this right? fixes #467
Update as per xoft's instructions.
Updated MakeColour's defenition in the header.
updated another file...
finally removed them all?
fixed compile?
Removed documentation for cChatColour:MakeColor()
Finally removed the function.
removed the function def also
Merge pull request #468 from mc-server/colourchange

Update chat colours