__traits and determining all overridable functions

[Christopher Wright]

Christopher Wright wrote:
> Hm. I thought I had solved that problem in my library, but now I see I 
> commented that test out. Bad me |:(

The constructor problem is solved, and I converted all my small 
integration tests into large integration tests (that is, instead of 
testing half the code with each test, they test all the code -- better 
than nothing).

But that isn't a great feat, once you have the rest.