Oops, actually enable JS filters in LiteServ
Allow logging to be redirected, and use NSLog on iOS devices

* Added +[CBLManager redirectLogging:]
* On iOS devices, always log to NSLog, since stderr output doesn't get
  saved anywhere that can be viewed later.
Fixes #395
Add JSONObjectWithDate:timeZone: to get a date with tz-offset.
Add Tests for JSONObjectWithDate(:timeZone) API.