Add __str__ for CppConstructor, to ease debugging
Add __str__ for CppConstructor, to ease debugging

gjcarneiro/pybindgen,ftalbrecht/pybindgen,cawka/pybindgen-old,ftalbrecht/pybindgen,cawka/pybindgen-old,cawka/pybindgen-old,ftalbrecht/pybindgen,cawka/pybindgen-old,gjcarneiro/pybindgen,ftalbrecht/pybindgen,gjcarneiro/pybindgen,gjcarneiro/pybindgen