ISODates are now JSONified as { "$date": "..." }

For example, ISODate("2013-01-24T06:40:43.068Z") is now represented in JSON output as { $date: "2013-01-24T06:40:43.0Z" }

Likewise, an incoming value of { $date: "2013-01-24T06:40:43.0Z" } will be stored as ISODate("2013-01-24T06:40:43.068Z")

Needs more testing, but should work as is.
Merge branch 'master' of github.com:zuk/DrowsyDromedary
added note about special treatment of date values