Create README.md
Merge pull request #1 from fuel/1.7/develop

1.7/develop
Added a new function, delete_forever, that can use the parent model delete function to permanently delete records. Functionality was not possible with current soft model
Removing README
Changing function name to purge and passing parameters to parent function
Merge pull request #276 from craighooghiem/1.7/develop

Adding Hard Delete Functionality to Model_Soft