added driver label names to the hierarchical case listing on the left. Warning: because of an apparent bug in the case recording, some case recording files will have confusing and incorrect displays
Merge pull request #1819 from hschilling/P77737796-add-labels-to-case-navigator

added driver label names to the hierarchical case listing on the left.
Merge branch 'dev' into work
Dealing with orphaned cases and also fixed up the scaling of the depgraph plot
fixed conflicts
Merge pull request #1822 from hschilling/P77737796-add-labels-to-case-navigator

Fixed up scaling issues for depgraph and deal with orphaned cases
add clean_graph function to Assembly, returns JSON or SVG representation of depgraph
Merge branch 'dev' into work

Conflicts:
	openmdao.lib/src/openmdao/lib/casehandlers/html_post_processor.py