Overview of changes in OpcUa plugin:

Version 0.0.1:

* initial implementation without security

Version 1.0.0:

* released implementation that works for OPC UA V1.0.
  - The protocol is not compatible to the previous version.
    Transport-layer, security-layer as well as the application-layer
	data types have changed.
  - This implementation is compliant to
    "OPC UA Part 6 - Mappings 1.00 Specification"
  - The security-layer is always present, but this plugin can only
    decode communication with security policy
	http://opcfoundation.org/UA/SecurityPolicy#None, which means
	that neither encryption nor signing is active.