wip: big flat pt.4: extract layout crate

layout/src/lib.rs

@@ -0,0 +1,18 @@
+pub use ::tek_engine;
+pub(crate) use ::tek_engine::*;
+
+pub(crate) use std::ops::{Add, Sub, Mul, Div};
+pub(crate) use std::fmt::{Display, Debug};
+pub(crate) use std::marker::PhantomData;
+pub(crate) use std::sync::atomic::Ordering::*;
+
+mod collection; pub use self::collection::*;
+mod direction;  pub use self::direction::*;
+mod layers;     pub use self::layers::*;
+mod logic;      pub use self::logic::*;
+mod space;      pub use self::space::*;
+mod transform;  pub use self::transform::*;
+
+#[cfg(test)] #[test] fn test_layout () -> Usually<()> {
+    Ok(())
+}