Zigbee and zwave manual install script

I have pushed v1.2.0…

* Changed download directories for the bindings after the BND migration 
* Changed to openhab-core-io-transport-serial
* Added openhab-core-config-discovery-usbserial
* Added org.apache.servicemix.bundles.xstream

Note: when installing/upgrading Zigbee, I have found that a restart of OH is required :slightly_frowning_face:.