Casbah3DateTime.scala

  trait JodaDateTimePrimitive extends BSONDatePrimitive[DateTime] {
    def rawValue(bson: Long): DateTime = {
        new DateTime(bson)
    }

    def bsonValue(raw: DateTime): Long = {
      raw.getMillis
    }
  }

  trait JDKDatePrimitive extends BSONDatePrimitive[java.util.Date] {
    def rawValue(bson: Long): java.util.Date = {
        new java.util.Date(bson)
    }

    def bsonValue(raw: java.util.Date): Long = {
      raw.getTime
    }
  }