Removed unneeded conditional_escapes from the testsuite.
Fixed #20864 -- Made the test client use common method for performing requests.
Fixed #11400 -- Passed kwargs from AbstractUser.email_user() to send_mail()

Thanks Jug_ for suggestion, john_scott for the initial patch,
and Tim Graham for code review.
Fixed #20709 -- Allowed {% widthratio %} to accept an "as" parameter.

Thanks clay.evil@ for the suggestion.
Added some doc links for django.contrib.messages