Bug - LiftMapper MappedDate doesn't convert from JString

[Nathan Vecchiarelli]

The setFromAny method handles JInt and JNull but not JString: https://github.com/lift/framework/blob/master/persistence/mapper/src/main/scala/net/liftweb/mapper/MappedDate.scala#L154

It can use the same code for the string conversion once it destructures it:

case JString(s) => parse(s).map(d => this.set(d)).openOr(this.get)

I'm using a work around for now but it'd be nice to have the main DateMapper class do it for me so it doesn't confuse new devs to my code base.