Modified extract_hashtags function to label every hashtag, even those in the same tweet. In main(), init main HASHTAGS and LABELS lists.

Indented label_list.append within extract_hashtags to create a label for every hashtag.
Deleted code that referenced LIB_HASHTAGS and CONS_HASHTAGS, simplified to a single hashtags list with accompanying labels list.
ipython notebook files
Debugging in ipy notebook - WIP