Add a new node-type for IEC61850-8-1
Similar to #87 (closed) we might consider implementing GOOSE messaging as a new node-type.
GOOSE is specified in:
IEC 61850-8-1:2011 - Specific communication service mapping (SCSM) - Mappings to Manufacturing Message Specification MMS (ISO 9506-1 and ISO 9506-2) and to ISO/IEC 8802-3
There are very simple examples in libiec61850: