Add DateTimeFromLocalDateColumnType

[DavidGregory084]

@brendanator, could you double-check my thinking here? This should allow round-tripping dates of the type constructed by a browser's date input control more easily while storing the date in the server's local timezone.

Set by a date picker in the browser:

JSON.stringify(new Date("Wed Sep 30 2015 00:00:00 GMT+0100 (GMT Daylight Time)"))
=> "2015-09-29T23:00:00.000Z"

Writing to the database:

// Deserialization
scala> "2015-09-29T23:00:00.000Z" match { case Iso8601(date) => date }
res0: org.joda.time.DateTime = 2015-09-30T00:00:00.000+01:00

// DateTimeFromLocalDateColumnType.write
scala> res0.toLocalDate
res1: org.joda.time.LocalDate = 2015-09-30

// Session.setArgument
scala> res1.toDate.getTime
res2: Long = 1443567600000

Reading back out again:

// Column.readBaseType
scala> new LocalDate(res2)
res4: org.joda.time.LocalDate = 2015-09-30

// DateTimeFromLocalDateColumnType.read
scala> res4.toDateTimeAtStartOfDay
res5: org.joda.time.DateTime = 2015-09-30T00:00:00.000+01:00

// Serialization
scala> Iso8601(res5)
res6: String = 2015-09-29T23:00:00.000Z

Displaying in the browser:

new Date("2015-09-29T23:00:00.000Z")
Wed Sep 30 2015 00:00:00 GMT+0100 (GMT Daylight Time)

[brendanator]

Looks good :+1: