signed_networks: link_prediction: background_metrics.py: infinity value set in x axis
utils.py: Counts: fixed an edge case when no counts are recorded
signed_networks: link_prediction: link.py: count_hops tests updated
signed_networks: link_prediction: list comprehension hell structure in place for bridge_type_before_edge_formation method.
util.py: moved array_as_matlab_row to util