Started new app feedback
Main feedback models
Add translatable category
Add pictograms
Custom list columns
Change email settings, now control managers
Add command to test managers emails
Some docs and changelog
CMD email
Send a mail on Report object creation
Test that email failure does not prevent creation
Test creation of reports via simple POST
Test that report can be created without geom
Check that locale follows accept-language
Update translation
Provide ids in feedback categories
Merge pull request #1038 from makinacorpus/1014_feedback_module

Feedback app and model (fixes #1014)