Restore Row extractor
Anorm refactoring
HttpExecutionContext should call delegate's prepare.
Merge pull request #3492 from cchantep/backport-2959

Anorm refactoring: backport #2959
Merge pull request #3515 from richdougherty/hec-prepare-2.3.x-backport

HttpExecutionContext should call delegate's prepare (2.3.x backport)
Merge pull request #3494 from cchantep/backport-3049

Restore Row extractor: backport #3049