Add docstrings to nav_tree.tests.test_models
Add docstring to nav_tree.tests.test_urls
Add docstrings to nav_tree.tests.test_utils
Add docstrings to nav_tree.tests.test_views
Add docstrings to pages.tests.test_handlers
Add docstring to pages.tests.test_models
Add docstrings to pages.tests.test_views
Add docstrings to redirects.tests.test_handlers
Add docstrings for redirects.tests.test_models
Refactor redirects.tests.test_views

* Split tests for permanent/temporary redirects from test for the
  redirect's target url
* Simplify integration test to focus on integration
* Remove essentially duplicate integration test
* Add docstrings
Merge pull request #27 from Ian-Foote/test-docstrings

Add docstrings to tests