Merge branch 'bugfix/unique-interactions' into 'develop'

Fixes unique interactions not working at all.

See merge request !12

pydtn/community.py

@@ -176,7 +176,7 @@ class Community:
         return len([
             other
             for other in node.community
-            if graph.has_edge(node, node)
+            if graph.has_edge(node, other)
         ])
 
     def community_betweenness(self, node_a, node_b):