add slugs and migrations
update test data with slugs
update urls, forms, and templates for slugs
remove misplaced dataset templates
add forms and views for project and dataset slugs
update url configurations
update project and datset templates with new urls
add some comments
Merge branch 'project-urls-views-forms' into project-urls-all

Conflicts:
	message_coding/apps/dataset/forms.py
	message_coding/apps/dataset/views.py
	message_coding/apps/project/forms.py
Merge branch 'project-urls-urlconfs' into project-urls-all
Merge branch 'project-urls-templates' into project-urls-all