vulnerability: fix serialization of 'evaluation_of_im' field in 'analytical_model_info'
vulnerability: fix serialization of 'model_fitting_method_assumptions' (typo in serialization configuration)
lost of bug fixes from shared google doc tems: 3, 4, 7, 8.2.1 & 8.2.3
countries set as required
update django-chained-multi-checkboxes dependency and new gem dependency convention adopted
fix the square brackets
revert to original version of setup.py
Merge branch 'vuln-fix-eval-of-im' of https://github.com/gem/oq-platform into vuln-fix-eval-of-im
Merge pull request #201 from gem/vuln-fix-eval-of-im

vulnerability: fix serialization of 'evaluation_of_im' field