changes to allow historical view data collection - fix bug where it would fail if the first essay had no view data - add ability to override dates in the cron script
use the type= feature in argparse - integrated the type= feature in argparse in all three scripts - removed some redundant code from the third file
changes in response to code review by nate - moved some common functions into files - other smaller changes
address confusion with date The timestamps in files should be the day that the exports are done. For the view data, the query date needs to be the day before but this shouldn't be the timestamp we use in files, etc.
fix bugs with the date stamps
renamed the wikipedia_views module to wikipedia