Merge expected_view variable into assertEqual
Remove unused RootNodeRedirectFactory
Improve import_from_dotted_path error message

* Avoid exposing rsplit implementation detail in exception message.
* Fix #28.
Merge pull request #34 from Ian-Foote/refactor-test-helper

Simplify NavTreeURLRouter test
Merge pull request #35 from Ian-Foote/error-message

Improve import_from_dotted_path error message
Merge pull request #33 from Ian-Foote/remove-unused-factory

Remove unused RootNodeRedirectFactory