Release notes

• Included handling for the new property attributes namespace, identifier_type, and identifier to identify a specific OPC UA Node
• Introduced new user-docs command-line argument for displaying user documentation
• Replaced special characters < and > by single quotes on error messages
• Added reason messages for all thing statuses
• Added new command-line argument for explicitly accept/reject SHA1 signed certificates
• Added new command-line argument for explicitly auto accept untrusted certificates
• Added new command-line argument for loading custom trusted certificates
• Deprecated command-line argument shared-cert
• Improved configuration handling