Initial reorg.

This is largely the same as #305, but updated for the current tree.

crates/misc/py/examples/gcd/README.md

@@ -0,0 +1,15 @@
+# Build example's file
+
+To build `gcd.wasm` use rustc (nightly) for wasm32 target with debug information:
+
+```
+rustc +nightly --target=wasm32-unknown-unknown -g gcd.rs --crate-type=cdylib
+```
+
+# Run example
+
+Point path to the built wasmtime_py library location when running python, e.g.
+
+```
+PYTHONPATH=../../target/debug python3 run.py
+```