Peg dependencies to django 1.10 compatible versions
Peg dependencies to django 1.10 compatible versions

Various django modules didn't have an explicit version and
newer versions were causing docker image build failures.  These versions
are based on what is currently in the published wger/apache docker
image.

rolandgeider/wger,wger-project/wger,petervanderdoes/wger,petervanderdoes/wger,petervanderdoes/wger,wger-project/wger,wger-project/wger,rolandgeider/wger,wger-project/wger,rolandgeider/wger,rolandgeider/wger,petervanderdoes/wger