Allow conversion of string/text columns to array

Closes #1

LGTM given by: @nhance

Squashed commit of the following:

commit 05357e2ff01abee849ded49f45b5238d3e42570e
Author: Valentino <valentino@reenhanced.com>
Date:   Fri Aug 2 09:03:19 2013 -0400

    Scope debugger gem to test/dev environments

commit 90194fbe44e2e713bc8f3f2b5d3cb6ebb61711f5
Author: Valentino <valentino@reenhanced.com>
Date:   Fri Aug 2 08:59:29 2013 -0400

    Allow conversion of string/text columns to array