PDAs now have a Nanotransen Relay Chat client
Removes the <font> from NTRC errors
Adds chatroom logging (both admin and IC).
Merge remote-tracking branch 'upstream/master' into hiasl

Conflicts:
	code/modules/client/client procs.dm
Lets AIs and pAIs use the chatroom function in their built-in PDAs.
Fixes chatroom runtime (thanks Gun Hog!), auto-adds # if the channel does not contain it already, obsoletes /new (its functionality is now included in /join)
Adds NTRC help screen, fixes PDA /join bug that let you join multiple times without updating chat_channel
Fixes chat channel bugs, removes PDA authentication because apparently our players are too dumb to not share passwords between ss13 and banking accounts
Merge remote-tracking branch 'upstream/master' into hiasl

Conflicts:
	code/modules/research/message_server.dm
Merge pull request #5490 from tkdrg/hiasl

Nanotransen Relay Chat