Macro for static assert that types implement a trait or not.

Example

Assuming you have the following definitions: ```rust struct Nadeshiko; struct Rin; struct Chiaki; struct Aoi; struct Ena;

trait Yakuru {} impl Yakuru for Nadeshiko {} impl Yakuru for Chiaki {} impl Yakuru for Aoi {} ```

This should build: rust assert_impl!(Yakuru: Nadeshiko, Chiaki, Aoi); assert_impl!(!Yakuru: Rin, Ena);

But this should fail to build: rust assert_impl!(Yakuru: Rin); assert_impl!(!Yakuru: Nadeshiko);