Initial version of the Dutch Smart Meter Binding

I have developed a new binding for Smart Meters in the Netherlands.

This binding reads the P1-port of Smart Meters and parses output conform the Dutch Smart Meter Requirements (v2.1, v2.2, v3.0, v4.0 and v4.04).

For more information of this binding see: http://www.lipin.nl/DSMRBinding.html

Note: Probably only Dutch OpenHab users are interested in this binding.
is this method meant to be enhancement somehow? If yes, please give an idea what else should be done here. If not, please remove this delegation to closePort().