Enabled display of subnodes
Fixed a bug that would make inserting new properties by list into a node impossible
Correctly configuring the exporter before running it
Introduced a checker-function that decides based on the current config and node, whether that node is displayable or not
Added preliminary markers for pose/posestamped content in node descriptions
Reintroduced drawing images and objects attached to nodes on the resulting .dot graph (this time, using the new exporter interface and framework)