Also, remove dependency on the Regex library by replacing the one place it was used with standard code that should hopefully be faster anyway.

std::str changes, and the way macros are expanded.

- Prefer iter over into_iter where appropriate
- Cut down on cloning

I'm serious, the more functionality I can use external crates for, the better.

Feels good turning all that code into a dependency!

Yeah, I broke my own code again.