title: Unmarshaling epoch timestamp into time.Time
body: <p>Running Decode() with this struct produces an error with the 'timestamp' column:</p>
  
  <pre><code>type Metrics struct {
          Id        int       `orm:"column(id);auto"`
          Name      string    `orm:"column(name);size(255);null" json:"metric_name"`
  json:"lon"`
          Timestamp time.Time `orm:"column(timestamp);type(datetime)" json:"timestamp;omitempty"`
  
  }
  </code></pre>
  
  <p>The error:</p>
  
  <pre><code> parsing time "1352289160" as ""2006-01-02T15:04:05Z07:00"": cannot parse "1352289160" as """
  </code></pre>
  
  <p>How can I parse it into a time.Time value?</p>
  
  <p>Thank you</p>