added user and oauth classes
added send() to job class. The idea is that the job class will automatically create a yahoorequest object which in turn will create an oauth object. The requestModule would just have to issue job.send() and the details of the request will be automatically worked out inside the two new objects.
player class updated with _id field
Also added send() method to yahooRequest class.
Updated error classes
updated gameMethods, processModules, oauth, server.js - server.js is being rewritten to use new User object. This object will take care of any Oauth related requests as well as mongo calls