Testing the Google news API and Watson Tone Analyzer

[chendaniely]

Things to do before merging:

• [x] remove API keys from code

• [x] use environ.yml to store API keys

• [x] re-write history so the keys can't be found from history

[chendaniely]

This PR fixes #36

[chendaniely]

if you need to re-run the notebook you need to create a environ.yaml in the root folder that looks like this:

news_api_key: ""
watson_api_key: ""