Crates io (#76)

* crates re-organisation

* fixed typo in layout & added test for vmp_apply

* updated dependencies

poulpy-hal/src/api/module.rs

@@ -0,0 +1,6 @@
+use crate::layouts::Backend;
+
+/// Instantiate a new [crate::layouts::Module].
+pub trait ModuleNew<B: Backend> {
+    fn new(n: u64) -> Self;
+}