title: timestamp with mongoskin how to?
body: <p>For those who want to query for timestamp here's how you do that:</p>
  
  <pre><code>&gt; db.foo.find()
  { "_id" : ObjectId("4e43a21d84782019413162ed"), "a" : { "t" : 1313055261000, "i" : 1 } }
  &gt; db.foo.find({'a': {'$gte': new Timestamp(new Date(2011, 8-1, 11), 0) } })
  { "_id" : ObjectId("4e43a21d84782019413162ed"), "a" : { "t" : 1313055261000, "i" : 1 } }
  &gt; db.foo.find({'a': {'$gte': new Timestamp(new Date(2011, 8-1, 12), 0) } })
  </code></pre>
  
  <p>i find that example in mongodb's page... but if i want to insert a timestamp in mongodb using mongoskin following the example???</p>
  
  <p>i try this:</p>
  
  <pre><code>db.collection('times').insert({time: new Timestamp(new Date('2012-08-06'),0)})
  </code></pre>
  
  <p>this is the error:</p>
  
  <pre><code>ReferenceError: Timestamp is not defined
  </code></pre>