Non-linear relative range scaling isn't looking awesome, so I am defaulting it to linear scaling. We can tweak later if we desire.
#240 Have the graph-relative node scaling working well, but not with the best scaling function. It is currently linear. I created a patient executor system to prevent wasteful calls to update all node sizes when the same call is about to happen again soon.
#240 Set the ontology embed back to using the discrete bin sizes for nodes, until we work out a nice function for graph relative node sizing. The rest of the relative system is working excellently; just the actual relation between number of classes and pixel size needs to be selected. I need outside input on this. Ready to merge to master.