Add irssi configs

Config is almost entirely from following
http://www.antonfagerberg.com/archive/my-perfect-irssi-setup/
Add irssi notifications via dunst
Switches no_screensaver script from python to bash
Adds '|' to left of nicks, too.
Fix typo in xmonad
Adds auto-install for emacs packages
Remove unused emacs color themes
Adds powerline to emacs
Adds hilight symbol mode to emacs
Adds flycheck and perspective to emacs
Adds SALSA mode to emacs
Adds ido mode to emacs, and some basic cfg changes
Adds chat-mode from triazo
https://github.com/triazo