0.4 Beta

This beta addresses one issue w/ the sorting and adds some better human readable slugs.

• Page slugs now have a prepended / for all published pages, and if a page is a child page, we now display the parent slug in front of the child slug. The home page will display / instead of whatever slug it may have had prior to being the front_page.
• Sorting of the "Slug" column is working now but with a few caveats. These are explained in further detail in issue #9 - looking for creative and non-super-hacky solutions to those.