Add name as a member of Node

[hanneskod]

In a parent-child node relationship the child is currently not aware of it's name. Adding name as a member of Node whould make printing the element name when we generate XML a simple thing, and generally makes sense.

This would however mean that name must be known at node creation in parser. A problem when the same node type is used multiple times in the same record. For example INT6 is used repeatedly for record counts in closing nodes. This issue needs to be resolved...