Prevent duplicate edges being retrieved from intermine

[Dan Bean]

Either prevent them being retrieved or prevent them being added by "add all" - otherwise some pairs of nodes end up with loads of edges between them. We might want to prevent the automatic interactions from ever creating a duplicate edge.

do allow duplicate edges with different interaction type do allow users to create whatever duplicates they want

[Dan Bean]

Fix issue #9 - prevent duplicate edges from interline

→ <<cset 5783afd9b8d2>>