Support for node-mongodb-native2

[ozomer]

There were few changes in the mongodb npm package in version 2 (the current "default" version is 2.0.42).
The insert command is marked as deprecated, and its callback gets a different result object:
http://mongodb.github.io/node-mongodb-native/2.0/api/Collection.html#~insertWriteOpResult

mongodb-queue.js fails at line 78 (Queue.add function):

self.col.insert(msg, function(err, results) {
    if (err) return callback(err)
    callback(null, '' + results[0]._id)
})

results[0] is undefined...

[chilts]

Is this what you're looking for #5 ?

That PR updates to v2 of the driver.

[ozomer]

Yes, but we already switched to RabbitMQ :)

[chilts]

That's cool, it will probably serve you better for big sites anyway. This is just for those little sites that are already using Mongo. Thanks for your initial issue anyway. :)