Add Admin::PagesController, #index action.

- Current spec status: 91 examples, 0 failures in 0.80243 seconds.
Refactor RootController to PagesController.

- Root view renamed to Pages#index from #home.
- Current spec status: 91 examples, 0 failures in 0.8018 seconds.
Merge pull request #5 from sleepingkingstudios/page-admin

Add Admin::PagesController, #index action.