added lookup when even expanded_url is a shortened url
Merge pull request #6 from pbinkley/realurl

added lookup when even expanded_url is a shortened url
renamed to unshorten.py and have it read in and write out each tweet json with an additional "unshortened_url" key for each url
added exception handling and logging
typo
typo
rely on requests to do the url shortening, since a short url can point at a short url, etc
Added command line application that extracts hashtags.
Update extractor
fix comments
Merge branch 'master' of https://github.com/recrm/twarc

Conflicts:
	utils/extractor.py
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