Add error handling to analysis launch views.
Analysis launch improvements.
Merge branch 'node_relationship_ui_feature' of github.com:parklab/refinery-platform into node_relationship_ui_feature
Implement analysis launching for single input workflows.
Merge branch 'node_relationship_ui_feature' of github.com:parklab/refinery-platform into node_relationship_ui_feature

Conflicts:
	refinery/ui/src/js/refinery.js
Refactor analysis_manager views run_nodeset and run_noderelationship into a single view run.  Code cleanup.