Adjusted readme

Author: Frank Schmid

README.md

@@ -14,6 +14,41 @@ _will come_
 
 _will come_
 
+## Examples
+
+### Creating a signed token with node-jwk and njwt
+
+The example uses bluebird promises to be able to catch exceptions thrown in the
+key retrieval and lodash for convenience.
+
+```
+const time = Math.floor(_.now() / 1000);
+
+const claims = {
+	iss: 'itsME',
+	aud: 'myAudience',
+	iat: time,
+	exp: time + 3600
+};
+
+return BbPromise.try(() => {
+	const keySet = nodeJWK.JWKSet.fromObject(myPrivateKeySet);
+	const jwk = keySet.findKeyById(myKeyId);
+
+	if (!jwk) {
+		return BbPromise.reject(new Error('Huh, my key is not there...'));
+	}
+
+	const keyPEM = jwk.key.toPrivateKeyPEM();
+	const jwt = njwt.create(claims, keyPEM, jwk.alg);
+
+	return BbPromise.resolve(jwt.compact());
+})
+.catch(err => {
+	return BbPromise.reject(err);
+});
+```
+
 ## Supported key types
 
 RSA, EC, oct