text: Title: Need to update setup.py description
  Body: In our setup.py file, we say we are using markdown:
  
  ```
  -    description="Convert trained traditional machine learning models into tensor computations",
  -    long_description=long_description,
  -    long_description_content_type="text/markdown",
  ```
  
  Pypi was not loving this.
  
  ```
  Uploading hummingbird_ml-0.4.11-py2.py3-none-any.whl
  100% ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 174.8/174.8 kB • 00:00 • 1.1 MB/s
  INFO     Response from https://upload.pypi.org/legacy/:
           400 The description failed to render in the default format of reStructuredText. See https://pypi.org/help/#description-content-type for more information.
      <html>
            <head>
             <title>400 The description failed to render in the default format of reStructuredText. See https://pypi.org/help/#description-content-type for more information.</title>
            </head>
            <body>
             <h1>400 The description failed to render in the default format of reStructuredText. See https://pypi.org/help/#description-content-type for more information.</h1>
             The server could not comply with the request since it is either malformed or otherwise incorrect.<br/><br/>
           The description failed to render in the default format of reStructuredText. See https://pypi.org/help/#description-content-type for more information.
  
  
            </body>
           </html>
  ERROR    HTTPError: 400 Bad Request from https://upload.pypi.org/legacy/
           The description failed to render in the default format of reStructuredText. See https://pypi.org/help/#description-content-type for more information.
  ```
  
  For now just deleted these 3 lines, but we should change the format away from markdown.   See [docs](https://pypi.org/help/#description-content-type)