Add an (internal) unique identifier to each node

This would make the connection ids more convenient and is necessary to d13n of reference nodes.

added enhancement label

changed milestone to %v0.2

marked this issue as related to #62 (closed)

assigned to @u.eisenbarth

created branch 63-add-an-internal-unique-identifier-to-each-node to address this issue

mentioned in merge request !34 (merged)

mentioned in commit 71d0c63d

closed with merge request !34 (merged)