Other: Added a test case for #652; Docs: Fixed centered formatting on npm

Author: dcodeIO

README.md

@@ -1,4 +1,4 @@
-<h1 align="center"><img alt="protobuf.js" src="https://github.com/dcodeIO/protobuf.js/raw/master/pbjs.png" width="120" height="104" /></h1>
+<h1><p align="center"><img alt="protobuf.js" src="https://github.com/dcodeIO/protobuf.js/raw/master/pbjs.png" width="120" height="104" /></p></h1>
 <p align="center">
     <a href="https://travis-ci.org/dcodeIO/protobuf.js"><img src="https://travis-ci.org/dcodeIO/protobuf.js.svg?branch=master" alt=""></a>
     <a href="https://coveralls.io/github/dcodeIO/protobuf.js"><img src="https://coveralls.io/repos/github/dcodeIO/protobuf.js/badge.svg?branch=master" alt=""></a>

tests/api_converters.js

@@ -149,6 +149,7 @@ tape.test("converters", function(test) {
             var msg = Message.fromObject(obj);
 
             test.same(Message.ctor.fromObject(obj), msg, "should convert the same using the static and the instance method");
+            test.equal(Message.fromObject(msg), msg, "should just return the object if already a runtime message");
 
             var buf = protobuf.util.newBuffer(3);
             buf[0] = buf[1] = buf[2] = 49; // "111"