Add docstrings to nav_tree.tests.test_models
Add class docstrings in redirects.tests.test_views
Docstring tweaks in nav_tree.tests.test_models
Merge pull request #36 from meshy/docstrings

Add docstrings to more tests
Rename test_requirements.txt to requirements.txt
Update travis for renamed requirements
Add requirements status badge to README
Merge pull request #37 from meshy/rename-requirements

Rename requirements, and add requirements status badge to README