Updated nuget package reference for EF6 to minimum 6.0
Updated nuget package reference for EF6 to minimum 6.0

BrettJaner/csla,jonnybee/csla,ronnymgm/csla-light,rockfordlhotka/csla,MarimerLLC/csla,JasonBock/csla,BrettJaner/csla,BrettJaner/csla,rockfordlhotka/csla,ronnymgm/csla-light,jonnybee/csla,JasonBock/csla,ronnymgm/csla-light,MarimerLLC/csla,jonnybee/csla,JasonBock/csla,MarimerLLC/csla,rockfordlhotka/csla