Update node-apn to version 1.3.1.
Version 1.3.0 had a bug which crashed the server.
Update Node.js dependency to version 0.10.4.
The node-apn library v0.3.x uses EventEmitter.listenerCount which is not
available on Node.js 0.8.x.
Merge pull request #13 from futurice/master

Update node and node-apn dependencies in order to make apns work again.