UA client and server SDKs updated (1/21/2018)

Configuration and certificate helper methods added for applications that need to handle the management application internally.
uaPLUS   UA Server Toolkit
EasyUA   UA Client SDK
OPCDA.NET-UA   UA add-on option for the OPCDA.NET Client SDK
OPCHDA.NET-UA   UA add-on option for the OPCHDA.NET Client SDK
OPCAE.NET-UA   UA add-on option for the OPCAE.NET Client SDK