Redirect to new 404 and 403 page in case of these errors

[tapaswenipathak]

We have debug turned on develop, should we turn it off there?

Also on the main one I tried access a 404 and got a screen like this. User should be redirected to a specific 404 informative page and after we merge user registration, login we also need 403 page.

[bhatiatanish]

I'd like to take up this issue. Can you assign me that?

[nikhita]

@bhatiatanish Only collaborators and members of a Github org can be assigned. However, consider yourself assigned and feel free to work on it. :)

[tapaswenipathak]

Closed with e88dada.