Added data quality visualization page
Raw phone data pages can now take date and users_to_return parameters for preloading the fields with values
Data quality visualization can now load (on click) a raw data page with parameters for period and users
Data quality link only visible for researchers
Fixed wrong questionnaire endpoint
Improved data exporter by fixing some bugs, cleaning the code and providing a retry mechanism for situations when the service randomly fails
Merge branch 'devel'