Feature hiveplots

• added Hiveplots visualization
  • add plots
  • customise how nodes are assigned to axis, on Connections: target (ingoing relations), source (outgoing relations), both, other Type: the node type/entity
  • customise how nodes are ordered on each axis
  • customise how many bins there are on each axis, (you can see as the resolution for each axis, how many nodes are on each axis)