playframework-2.1.1

Here are some updates for playframework-2.1.1.

Aside from the dependency/build updates, I had to fix up PlayAsyncIOWriter.java to compile with playframework-2.1.1. I updated atmosphere-runtime to 1.1.0.RC2 too.

After getting a clean build and install I did a quick smoke test on a Mac via

    cd samples/chat
    mvn play2:run

The chat sample works in Firefox and Safari but _doesn't_ work in Chrome -- it simply hangs on connect. I went back and checked and this problem happens in both the original 2.0.4/preforked version and this 2.1.1/forked version.