Addition of new 'Stat' controller for recording version request information as request by Matt. Code changes include new migration file, model and controller ammendments.
Final commit following testing on my local machine, this closes issue #2 (https://github.com/SIMSBulkImport/WebAPI/issues/2)
Merge pull request #7 from bobsta63/master

Added functionality as requested - Implements version request logging to a new 'stats' table.