Add Compose key combinations for ɹ and ✓
Stop tig from complaining about unknown settings
Remove interaction with X clipboard

It turned out to be quite buggy, and I didn't use it enough to justify
investigating.

The problem is that sometimes xclip does not terminate, blocking tmux
from receiving new commands.
arbtt: XTerm is a terminal too!
arbbt: account for some other program names used by browsers
mcabber: set resource and priority
Generalize ~/misc/nethack_games to Moria and other games
Grep with colour
tmux with irssi: disable ^A and ^Q so that I can bind them in Irssi
Add sleep 1 before spawning i3lock

It's too damn fast: it starts so fast that I can't release hotkey in
time! i3lock notices that and turns screen backlight back on, which is
undesired.