title: Serverless Framework - Python and Requirements.txt
body: <p>Using the serverless framework v1.0.0, I have a 'requirements.txt' in my service root with the contents being the list of dependant python packages. (e.g. requests).</p>
  
  <p>However my resulting deployed function fails as it seems these dependencies are not installed as part of the packaging </p>
  
  <p>'Unable to import module 'handler': No module named requests'</p>
  
  <p>I assume it is serverless that does the pip install, but my resulting zip file is small and clearly its not doing it, either by design or my fault as I am missing something?  Is it because its Lambda that does this?  If so what am I missing?)</p>
  
  <p>Is there documentation on what is required to do this and how it works?  Is it serverless that pip installs these or on aws lambda side?</p>