Implementation of creating work specifications for a group

ldvspec/lofardata/forms.py

ldvspec/lofardata/templates/lofardata/index.html

.../templates/lofardata/workspecification/create_update.html

ldvspec/lofardata/tests/test_dataproduct.py

ldvspec/lofardata/tests/test_dataproductinfo.py

ldvspec/lofardata/tests/test_group_creation.py

ldvspec/lofardata/tests/test_split_obs_ids.py

ldvspec/lofardata/tests/test_workspecification_creation.py

ldvspec/lofardata/view_helpers/specification.py

ldvspec/lofardata/views.py