Create Python version; fix Rust code sample on README

python/.gitignore

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+/Cargo.lock
+/target

python/Cargo.toml

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+[package]
+name = "hyperbuild-python"
+publish = false
+version = "0.0.19"
+authors = ["Wilson Lin <code@wilsonl.in>"]
+edition = "2018"
+
+[lib]
+name = "hyperbuild_python_lib"
+crate-type = ["cdylib"]
+
+[dependencies]
+hyperbuild = "0.0.19"
+
+[dependencies.pyo3]
+version = "0.9.0-alpha.1"
+features = ["extension-module"]
+
+[target.x86_64-apple-darwin]
+rustflags = [
+  "-C", "link-arg=-undefined",
+  "-C", "link-arg=dynamic_lookup",
+]

python/src/lib.rs

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+use hyperbuild::hyperbuild as hyperbuild_native;
+use pyo3::prelude::*;
+use pyo3::exceptions::SyntaxError;
+use pyo3::wrap_pyfunction;
+use std::str::from_utf8_unchecked;
+
+#[pyfunction]
+fn minify(code: String) -> PyResult<String> {
+    let mut code = code.into_bytes();
+    match hyperbuild_native(&mut code) {
+        Ok(out_len) => Ok(unsafe { from_utf8_unchecked(&code[0..out_len]).to_string() }),
+        Err((err, pos)) => Err(SyntaxError::py_err(format!("{} [Character {}]", err.message(), pos))),
+    }
+}
+
+#[pymodule]
+fn hyperbuild(py: Python, m: &PyModule) -> PyResult<()> {
+    m.add_wrapped(wrap_pyfunction!(minify))?;
+
+    Ok(())
+}