[arg_discuss] Wiki pages: IRC chat archives + IRC instructions

[Adam Martin]

I've put all the transcripts / chat logs I could find from previous
ARG SIG IRC chats on the IGDA wiki here:

   http://www.igda.org/wiki/Alternate_Reality_Games_SIG/IRC_Chats

and the instructions for joining future IRC chats here:

   http://www.igda.org/wiki/Alternate_Reality_Games_SIG/IRC_Chats/IRC_Instructions

If there's anything with the instructions that needs improving, please
go head and improve them! (edit them directly - if you don't have an
IGDA wiki account, it's free to create one, just go to the site and
click the Register / login link at the top right of the page).