Merge pull request #1 from ryanhightower/master

Revert "refined data to companies less than 500 employees and more than ...
Sorting companies and use DateTime object

Added function to sort companies by Growth Rate before outputting to
table. Also refactored code to calculate dates using DateTime object
instead of strtotime().
Resolved Conflicts
Merge pull request #2 from ryanhightower/Refined-Query

Sorting companies.