switch i3bar->tint2, zsh bell, pbuild/run->portpkg

stop using i3bar, switch entirely to tint2
zsh bell on long operations + urxvt urgentOnBell
pbuild and prun combined into `portpkg [build/run]'
compton changes and optimizations
luakit changes
ssh-agent added to .xinitrc
.Xresources fix, `depth: 32' broke many things including old X apps