Added help for telnet clients.

Conflicts:
	Chatters.dme
	code/models/chatter/commands.dm
Re-orders the HTML tags to match the ordering of the BB tags.
Make sure issues point to our fork.
Allows telnet to speak without entering a command first.
Allows muting and banning of guest keys. All are muted/banned in one go.
Merge remote-tracking branch 'origin/master'

Conflicts:
	code/models/chatter/commands.dm