Big changes

Database should be working. Still need to setup functions for daily
cleanup of stock prices and updates based on date range. There seem to
be some strange numbers populated when putting them into a list that
need to be looked into further. Have added ActionBar icons, only
functioning icon is the add button currently. Have also implemented a
Shared Preferences structure that will save the currently watched
stocks and the index of the stock that was last viewed. Layout is close
to finished.