customizations to i3 statusbar

Squashed commit of the following:

commit b5ac27554bf052e6ff3e691da4e3eee113b39111
Author: Conor Schaefer <conor.schaefer@gmail.com>
Date:   Thu Jun 12 16:32:50 2014 -0400

    adds volume display

commit 105268688c6f05d4d07f0dd9c39f1301b4e78650
Author: Conor Schaefer <conor.schaefer@gmail.com>
Date:   Wed Jun 4 18:21:42 2014 -0400

    terser i3status

commit 99671da0d10df7abbe9cc764d42c10ffb3c13c98
Author: Conor Schaefer <conor.schaefer@gmail.com>
Date:   Wed Jun 4 18:18:29 2014 -0400

    adds default i3statusbar
Merge branch 'more-i3-config' of github.com:ronocdh/dotfiles into more-i3-config