Fix issue #6 in main branch:

[gazoodle]

Generic template class needed const ref to avoid copy constructor being called.
Added tests to validate

[peterpolidoro]

Great work, thank you so much!

[peterpolidoro]

Hi! Someone opened an issue #8 having problems including type_traits. When is type_traits intended to be available, when someone is not using Arduino AVR? What about all of the other cases when type_traits would not be available? Do we ever really need to include type_traits or can we simply always use the trival version of is_signed?

[gazoodle]

It was belt and braces coding. Normally a modern C++ compiler would have the type traits from the STL collection, but some of the tool chains didn’t have this hence the “light” version. Of course we could always use the light version since we’re only interested in the is_signed functionality, so removal of the include and conditional should be fine, except for the case where someone has <type_traits> included as well, then you’d get a conflict. I suspect we can fix it using namespaces. Let me have a play around and I’ll get a fix checked in.