Bugfixes:

- SAML XML discovery was broken
- cspreporting did not verify browser object properly
- Removed leftover stubs (fum_utils)
- Formatting fixes to templates
- Error views (only enabled with FAKE_TESTING) to test 403/400 pages.
Plenty of updates for tests. Better code coverage.

Preliminary SSO provider tests. These does not provide
any conformance validation.