title: Can not query TimeStamp oplog.rs by Robomongo tools
body: <p>In oplog.rs collections have somethings like below:</p>
  
  <pre><code>{
      "ts" : Timestamp(1401265282, 41),
      "h" : NumberLong(-8979599167307291610),
      "v" : 2,
      "op" : "i",
      "ns" : "test",
      "o" : {
          ...........
      }
  }
  </code></pre>
  
  <p>Use Robomongo tool I type the following query:</p>
  
  <pre><code>db.oplog.rs.find({"ts": Timestamp(1401265282,41)})
  </code></pre>
  
  <p>I get nothing :(</p>
  
  <p>When I use the mongo client tool in console it works.</p>
  
  <p>So is there some things wrong with the Robomongo tools ? I want to use this tool for manage our data but stuck here.</p>