better operator<< with std::basic_ostream

[gicutza]

`template
struct Printable : crtp<T, Printable>
{
template
void print(std::basic_ostream& os) const { os << this->underlying().get(); }
};

template <typename CharT, typename T, typename Parameter, template class... Skills>
std::basic_ostream& operator<<(std::basic_ostream& os, NamedType<T, Parameter, Skills...> const& object)
{
object.print(os);
return os;
}`