req.facebook.me() incorrect cb

[hiattp]

You have:

this.me = function(cb) {
if (self.token) {
self.get('/me', function(me) {
cb(me);
});
} else {
cb();
}
}

But the successful self.get function returns cb(null,result), so it should be:

this.me = function(cb) {
if (self.token) {
self.get('/me', function(err, me) {
cb(me);
});
} else {
cb();
}
}

Sorry for not just making the edit and submitting a pull request but I made a few other changes others may not want and this is a pretty minor fix :).