SocNetV 1.5 "standardization"

Version 1.5 brings new features and bugfixes.
Among the new features are :
* Prominence indices on valued networks
  A new SSSP-solver algorithm has been implemented (Dijkstra)
  which allows SocNetV to compute prominence indices on weighted
  networks. When the graph edges are weighted, the application
  asks the user if it should consider weights in computations.
  Also, it asks the user if weights should be inverted or not.
  This question is crucial since edge weights can have
  different meanings. For instance they can denote cost or votes.
  If they denote cost, then the geodesics should be those paths
  with minimum value. But, if the weights denote votes, then the
  geodesics could be those path with maximum value. In the latter
  case, the user should choose to invert weights so that Dijkstra
  compute the desired paths and distances.

* Standardized Centrality and Prestige scores
  From this version all actor prominence indices report standardized
  scores (from 0.0 to 1.0) where applicable. If there is no known
  formula to compute such a standardized score for actors, then
  SocNetV computes a std score by dividing the original index score
  by the sum of index scores of all actors. For instance, this happens
  on PRP. Warning: If the original prominence index has range
  from 0 to 1 (i.e. EC and IRCC), SocNetV considers that as std and
  does not compute anything else.

* Work without isolates, if you like
  The user can omit isolates and compute prominence indices
  for the resulting graph.

* Graph connectedness
  SocNetV can report the network connectedness (whether it is a
  connected graph or digraph, unilateral etc). Also it can check
  whether isolates exist that can be removed so that the graph
  can become connected

* CC drops isolates by default
  Up to v1.5, SocNetV did not compute CC scores if the network had
  isolate nodes, instead it urged the user to use IRCC. From this
  version, SocNetV checks if isolates exists and automatically drops
  them in order to compute CC scores.

For a complete list of changes and bugfixes, see the ChangeLog.