Delete node

[RLieske]

There is a method to add new nodes to the tree. It would be good, to also have the functionality to delete nodes (matching some criteria, like node.getName().equals(criteria)).
The node should be removed from both list and map.

[chris-martin]

Keep in mind this library was initially written just as a parser, without any consideration to being able to programmatically construct nodes. Perhaps it ought to be redesigned a bit to help support that use case. Will give it some thought.