styling for headers that relate to tabbed pages and views

Make TabbedPage.name and TabInstance.name SlugFields as they are used in URLs. Also rename TabInstance.view_name to tab_type, which is clearer and paralles the dashboard implementation.

When process_items is called without a request, redirect to data-view (don't try to double guess the tab)

Provide the tab instance to get_context_data, and use that to work out the URL to redirect forms to.

Also added test

Merge branch 'make_view_edit_view_into_tab' of github.com:aptivate/internewshid into make_view_edit_view_into_tab

Conflicts:
	django/website/tabbed_page/templatetags/render_tab.py

Remove outer html from the view and edit page, this is now taken care of by the tabbed page rendering.

-- show developed by aptivate on small screen

Increase time before fade out on 'update' messages

Conflicts:
	django/website/tabbed_page/tests/render_tests.py

-- flow both actions and save 'row' on small screens to be on one line - currently save button falling below field. (have reduced dropdown width on smallest screen only where this was a problem)

Conflicts:
	django/website/tabbed_page/tests/render_tests.py

Conflicts:
	django/website/tabbed_page/tests/render_tests.py