Adds Dataset Management functionality at the user level

package-lock.json

package.json

portal/forms.py

portal/migrations/0003_auto_20190626_1152.py

portal/migrations/0004_dataset_created_by.py

portal/migrations/0005_auto_20190626_1600.py

portal/models.py

portal/templates/portal/secure/admin/delete.html

portal/templates/portal/secure/user/base.html

portal/templates/portal/secure/user/create_update.html

portal/templates/portal/secure/user/datafile_list.html

portal/templates/portal/secure/user/dataset_list.html

portal/templates/portal/secure/user/delete.html

portal/templates/portal/secure/user/list.html

portal/urls.py

portal/views/__init__.py

portal/views/secure/datafile.py

portal/views/secure/dataset.py

requirements.txt