WIP: Attempt at name override

[strfry]

Refers to #55

I hacked together this solution to resolve our naming of templates problem.

Now custom type names can be specified like this:

constexpr auto W_ClassNameOverride(w_internal::W_TypeWrap<StageQml> = {}) {
    return w_internal::makeStaticString("Stage");
}

There's a few points for discussion in there:

• The W_TypeWrap template is introduced, to allow the override to be found anywhere via Argument-Dependent Lookup
• The namespacing is off, it isn't so nice to require users to reach into the w_internal namespace
• I would like to shorten the definition for a name override, but apparently the makeStaticString() call is required to correctly wrap the char array

Please have a look and comment.

Regards, Jonathan

[ogoffart]

The namespacing is off, it isn't so nice to require users to reach into the w_internal namespace

Maybe the function should be a member function.

[ogoffart]

Implemented as part of https://github.com/woboq/verdigris/pull/69