Added DateTime and Company as a type in the data set.

- Added date conversion utilities that convert the date taken from twitter in to something more usable.
- Adds this converted date into the data set sent to the database, will show up as a datetime python object.
- Added compatibility for company name as a type in the data set sent to the database.
- Overhauled sentiment_analyzer.py so that it is much more optimized and cleaner.