Feature/gh 1620 mark as skipped (#1641)

opentech/apply/activity/messaging.py

.../activity/migrations/0050_add_report_skipping_activity.py

opentech/apply/activity/options.py

...ply/activity/templates/messages/email/report_skipped.html

...y/activity/templates/messages/email/report_submitted.html

opentech/apply/projects/migrations/0030_report_skipped.py

opentech/apply/projects/models.py

.../templates/application_projects/includes/report_line.html

...ects/templates/application_projects/includes/reports.html

...rojects/templates/application_projects/report_detail.html

opentech/apply/projects/tests/test_models.py

opentech/apply/projects/tests/test_views.py

opentech/apply/projects/urls.py

opentech/apply/projects/views/report.py