initial draft of simple app

still non-functional, but good progress.
Add tsv support
Trim comma-separated list parts in string domain
Adding nicer listing of output datasets
Adding more intuitive input/output editor
new function: performAnalysis

encapsulate this functionality so it can be more easily
shared with other webapps.
add VTK types to arborweb

This commit also contains a more reliable solution for shutting
down vtkweb when the user refreshes or closes the page.
rename simple

putting this project on the back burner for now while we
investigate ancestral states.
Merge branch 'master' of https://github.com/arborworkflows/ArborWebApps

Conflicts:
	arborweb/js/views/AnalysisManagementView.js
	arborweb/js/views/DatasetManagementView.js
	arborweb/js/views/VariableEditView.js