Mark A. Gibbs

I don't think the standard is particularly consistent about how it denotes what would be used as concepts constraints. For example, swap (20.2.2) in the [C++17 draft standard](http://open-std.org/JTC1/SC22/WG21/docs/papers/2016/n4594.pdf) has: >...

Updated PR to current repo structure and style.

Just a suggestion off the top of my head: Given the simplicity of the tests, incorporating a proper test and mock framework is probably insane overkill. You could probably get...