Add test case for destroy record without primary keys
Merge pull request #223 from Paxa/ar_4.1.x

Add test case for destroy record without primary keys
Remove code - all tests still pass and it fix breakage in our Rails app.
Updated version/history.
Fix Persistence overrides so all included modules are called correctly - this restores callbacks.
Version 7.0.6
Merge branch 'master' into ar_4.1.x