beremiz

Runtime: add GetVersions() call to PLCObject, use it in web settings and expose it in WAMP and Pyro.

Note: WAMP changes are untested
<?xml version='1.0' encoding='utf-8'?>
<ModbusServerNode xmlns:xsd="http://www.w3.org/2001/XMLSchema" Local_Port_Number="1502" Local_IP_Address="127.0.0.1"/>