Remove unused template demo code
Clarify some licensing things
Add new diary fields, migration.

Add free text fields for pricing and film data, plus subtitle and surtitle.
Also modify event template to allow default pricing to be set.
Add new fields to event edit form

Also add to internal event details view.
Add new fields to copy summary view template
Add new fields to public views, plus tests
Set event pricing from selected EventTemplate

Also add tests for setting Event tags/pricing from template in general.
Merge branch 'new_fields' into programme_redesign

Conflicts:
	toolkit/diary/static/diary/css/programme.css
	toolkit/diary/templates/event_fragment.html
Further re-styling of public programme page.

Take out ajax retrieval of full copy, restyle.
Make main programme view (a bit) responsive