text: Title: Update documentation dependencies
  Body: Review the changes upgrading our documentation dependencies have on our built documentation. If approved, update deps in `requirements.txt` and `docs/requirements.txt` as follows:
  
  ```
  ## Documentation (uncomment to build documentation)
  Sphinx>=1.7.4
  sphinx-rtd-theme>=0.3.1
  numpydoc>=0.8.0
  ```