add filtering support of infeasible(None) objective value
add constraint filtering support of paretofilter and add constrained example of single_objective ei with constraint
minor error modifications
Merge remote-tracking branch 'origin/dev' into dev
Merge remote-tracking branch 'origin/dev' into dev
Merge pull request #1735 from setowns1/bug

Parameters of ISolver drivers do not require high/low metadata.
added dot plotting of our graphs
fix for unwanted pseudocomps in a workflow
Merge pull request #1736 from naylor-b/dotgraph

fix to remove extraneous pseudocomps from a workflow
Merge remote-tracking branch 'origin/dev' into dev
test works
Merge pull request #1721 from cwmine/dev

add constraint filtering support for paretofilter and modified constrained  single_objective_ei to test it
Yet another fix to VariableTree copying...