grfiv/healthcare_twitter_analysis — pull request #1 by renewang (2014-11-05 05:39:09+00:00)
Title: some minor fix on mapquest and add environment variable to retrieve key 

I modified get_tweet_json.py:
1. to allow geocoding as false
2. to ensure the url sent to mapquest api is encoded.
3. use list for location dictionary for tweets with duplicate locations
Also modified tweet_credentials in which the hard-coded api key/secret is replaced by os environment variable.
Thanks for your time to review this.