Add an example of console.log

Also clean up some other exampels

examples/hello_world/index.js

@@ -1,17 +1,6 @@
 // Note that a dynamic `import` statement here is required due to
 // webpack/webpack#6615, but in theory `import { greet } from './hello_world';`
 // will work here one day as well!
-const js = import("./hello_world");
+const rust = import("./hello_world");
 
-Promise.all([
-  js,
-
-  // Due to https://github.com/webpack/webpack/issues/6475, Webpack does not
-  // support sync wasm imports larger than 4kB in Chrome. We use wasm2es6js to
-  // hack around this and need to defer our call until the converted wasm
-  // module is asynchronously loaded. Uncomment this line to enable.
-  // This hack is not necessary in Firefox.
-  // import("./hello_world_bg.js").then(wasm => wasm.booted),
-]).then(([js]) => {
-  js.greet("World!");
-});
+rust.then(m => m.greet("World!"));