adds chef cookbook for postgresql config

Squashed commit of the following:

commit 26c0b7fef4a4ab0845730bbe0fcfeb8c01c6cf2a
Author: Conor Schaefer <conor.schaefer@gmail.com>
Date:   Sun Oct 27 23:45:39 2013 -0400

    comments out unused cookbooks

commit bd0980baf17d23c926f73f89f8c0d406bb94535f
Author: Conor Schaefer <conor.schaefer@gmail.com>
Date:   Sun Oct 27 22:48:41 2013 -0400

    adds postgresql cookbook

commit 0d8e427d451cde057c8724e842bfc391bc0bdc0f
Author: Conor Schaefer <conor.schaefer@gmail.com>
Date:   Sun Oct 27 22:18:07 2013 -0400

    removes unused chef-client upgrade recipes

commit 9c87dcc3c361da1e041a86c32ab763a938cd4c4b
Author: Conor Schaefer <conor.schaefer@gmail.com>
Date:   Sun Oct 27 21:44:44 2013 -0400

    fixes chef-client errors by upgrading chef-client before chef_solo run