Updated addUser function to grab user tweets and create a user word document in the DB
User friends and word document are now updated each time the user logs in
Updating semantics functionality. User document is automatically updating in the database. Beginning work on updating the corpus whenever a user document changes
Debugging semantic_helpers.  parseTweets is functioning as it should be.  Moving on to updateUserDoc
Updated parseTweets function to filter correctly
Debugging retrieveCorpus in semantic_helpers. Need to wipe the database before continuing
Finished debugging semantic_helpers
Merging changes into master
Cleaned up a few things
implementing tf/idf
minor bugfix