Feature/#79 notification stream

Closes #76 and #79

See merge request !128

Fix/48 gui fixes

Closes #78, #67, #13, and #48

See merge request !127

# Conflicts:
#   discuss_data/static/sass/project.scss
#   discuss_data/templates/core/_edit_form.html
#   discuss_data/templates/dddatasets/prep/_dataset_header.html

Feature/12 adding tags to dataset in prep behaves inconsistently

Closes #12

See merge request !126

now easier to read

Feature/category curators

See merge request !125

# Conflicts:
#   .gitlab-ci.yml
#   discuss_data/dddatasets/views_prep.py

fix(UIUX): add badge for not published datasets and badges for access models of published datasets to my data. Fixes #13

fix(UIUX): add get_help_text function to publications form, required 'http://' prefix for URLfields should be mentioned there. Fixes #67

fix(affiliation): get rid of weird control char after checkbox label for boolean, probably caused by crispy/bootstrap/django-forms mixup

fix(UIUX): set empty categories/countries lists for filters to None to avoid showing empty filterlist

fix(countrytags): create dedicated section for countries controlled vocabulary to distinguish from controls for user generated tags

Feature/#65 remove inline javascript

Closes #65

See merge request !120

# Conflicts:
#   .gitlab-ci.yml