Site Root now renders Index Page, redirect to Root if page not found

* The site's root (http://clemsondancers.com) should show the page
  that's been indentified as the index.
* The PagesController was redirected to the Admin's pages path if the
  page could not be found, which is not what visitors expect. Instead,
  it should redirect to the root of the site.
* Wrote tests to confirm the PagesController works as we expect it to.
Use the page's title as the view's title when rendering a page

* This is what users expect, since we want the title for the site to
  be based on the title of the page (e.g: "Clemson Dancers: Calendar")
Move Page rendering into a partial, use when showing pages & in admin

* The page should render the same way when looking at the site's index
  a page in the site, and when admins view the page.
  * This means this behavior should be moved into a partial and called
    in each view.