Added override to performPostProcess() so that the queried node(s) will be colored red on the graph to match the current Legend
Fixed spelling of "hierarchical" in the layout menu (again)
Updated html to include updated Cytoscape from core
Updated Walker.html to use javascript in core.  Walker-specific code will remain in Graphene-Walker and used in place of what's in core.
Use local legend definition instead of generic one in core