text: Title: Unable to install requirements
  Body: When installing the requirements I am met with a host of "Could not find a version..." errors. I have confirmed that I am indeed using Python 3.5 and followed your instructions on creating and activating a conda environment. See error below:
  
  ```
  Collecting anaconda-navigator==1.8.7 (from -r requirements.txt (line 7))
    Could not find a version that satisfies the requirement anaconda-navigator==1.8.7 (from -r requirements.txt (line 7)) (from versions: )
  No matching distribution found for anaconda-navigator==1.8.7 (from -r requirements.txt (line 7))
  You are using pip version 10.0.1, however version 19.0.1 is available.
  You should consider upgrading via the 'pip install --upgrade pip' command.
  ```