We support this in the API as of 0.10.2 so read should support it too.
Trivially tested with some log info:
`core: data: data="map[string]interface {}{"zip":[]string{"zap", "zap2"}}"`
* Allow lease_duration to be pulled out with -field
This also provides an easy way to verify that when -field is used we
don't string format the value.
This also changes the human string helper to accept more than one type
of incoming int.
* Address review feedback
