Add #![doc(html_logo_url = ...)] to crates

bytecode/src/lib.rs

@@ -1 +1,4 @@
+#![doc(html_logo_url = "https://raw.githubusercontent.com/RustPython/RustPython/master/logo.png")]
+#![doc(html_root_url = "https://docs.rs/rustpython-bytecode/")]
+
 pub mod bytecode;