[nixio] Create many to one and many to many relationships

Runs the two utility methods before returning loaded Neo blocks

Author: achilleas-k

neo/io/nixio.py

@@ -291,6 +291,10 @@ def _nix_to_neo_block(self, nix_block):
             # parent reference
             newchx.block = neo_block
 
+        # create object links
+        neo_block.create_many_to_one_relationship()
+        neo_block.create_many_to_many_relationship()
+
         # reset maps
         self._neo_map = dict()
         self._ref_map = dict()