continued refactoring.  completely unstable
switched flow to use graph class.  things still not working
added edge types to graph
scatter plot runs again
fixed flow instantiate() bug.  g.layoutNode() was creating mulitple barrier instances
fix graphic-test with correct spec
fixed bug when training scales on pixels causing scales to be mis-aligned
removed multiple calls to trainScales, which is not idempotent
fixed cloneSubplan bug in when there are consecutive barriers and faceting
fixed cloneSubplan bug in when there are consecutive barriers and faceting
fixed color scale, scaleset.types, and slew of bugs.  added release.html example