s/wwww/www/
Add IRCnet to major networks in navigation bar
Mac: Prettify markdown, add YAML, add XChat Azure
remove leftover vim swap files
Add vim swap files to gitignore
Add some (rather technical, I fear) IRCnet infos

This extends the previously stub IRCnet article to a reasonable size and perhaps
explains some of IRCnets peculiarities.
Update copyright notice s/2012/2013/
Merge pull request #18 from wilhelmy/master

htaccess fixes s/wwww/www/ (I must have been sleep deprived or something?) and other cleanup.