Removed pages from the page url

- Converted /pages/about-us to /about-us
- Changed UrlRewrites controller into a middleware

Signed-off-by: Rahul Trikha <rahul.trikha@gmail.com>
Made find_redirect method private

Signed-off-by: Rahul Trikha <rahul.trikha@gmail.com>
Minor refactoring

Signed-off-by: Rahul Trikha <rahul.trikha@gmail.com>
Merge pull request #89 from rahult/feature/remove_pages_from_page_url

Removed pages from page urls