Redirect to 404 page.

Redirect ot 404 page when the requested url does not match any of the provided state paths.
Redirect to error page when resource is not found
Fix error image path
Make ninja full width of page
Remove body error css
Merge remote-tracking branch 'origin/master' into feature/errorpage
Merge pull request #575 from reviewninja/feature/errorpage

Feature/errorpage