Add perpetual getting of tweets
Merge remote-tracking branch 'upstream/master'

Conflicts:
	get_tweets.py
Merge pull request #18 from AaronTR/master

Updated get_tweets and tweetcache
Updated sentiment_analyzer.py
Merge remote-tracking branch 'upstream/master'

Conflicts:
	get_tweets.py
	sample.db
Added support for identifying company name a tweet is referring to