Refactoring binding generation for default constructors for simple types (fall back to use lambda function) so it is now compatible with Pybind11-2.2.
Refactoring binding generation for default constructors for simple types (fall back to use lambda function) so it is now compatible with Pybind11-2.2.

RosettaCommons/binder,RosettaCommons/binder,RosettaCommons/binder