Merge tag 'v1.5.1' into develop

1.5.1
Merge tag 'vdebug-tests' into develop

1.5.2
django-password-reset updated, "tour" as default state after login & /account/reset-password-confirm fixed #305
Added unique properties model using field name
Debug empty value
Merge branch 'develop' of github.com:jplusplus/detective.io into develop
Bumped to 1.5.3
Merge branch 'release/1.5.3'