Merge pull request #370 from bepetersn/master

fixes issue #369; patch stupid deleting of line in controller.py
Issue #372, changed booking_date model to allow null values, also set start date of scrape 15 days back.
Issue #373, changed InmateDetails to capture booking date as date object not datetime object, should have been done with #55 changes
Merge pull request #374 from nwinklareth/master

Model changes to deal with scraping problems associated with issue #372