Set sensible initial defaults for new pages.
Improved admin UI for static pages.
Redirecto to the full path, which includes script_name.
Removed the need for external resources.

The export view works on its own with no external dependencies, so the
whole HTML page can be copy-pasted elsewhere.
Documentation fixes.
Upgraded bundled Select2 version.
PEP8: line too long.
Revert "Pass fields as a comma-separated list."

This reverts commit c2af3884133f93dacd29dc5a06a11483ddb7ac6c.
Rename included templates to start with an underscore.
Mention naming for included templates.
Always pass language and project in the template context.