Initial commit of Wemo Binding for openHAB 1.x

This is a new implementation of a binding for Belkin's Wemo-Switch.
Information on how to setup the binding can be found in the included readme.md (prepared WIKI page).

Please feel free to comment !

Regards
Hans-Jörg
you could use the "?" operator once and avoid code duplication. Like:

State itemState = state.equals("1") ? OnOffType.OFF : OnOffType.ON
eventPublisher.postUpdate(itemName, itemState);