Started work on client-side code for standardized hierarchical facets
Added parameter field to HierarchicalMethod annotation
Added toJSONObject method on HierarchyEntry
Added toString method to HierarchyEntry
Updated JavaScriptGenerator and SemantEcoServlet to generate JS for hierarchical methods and respond to a hierarchical method call.
Added underscore.js
Added jQuery UI to webapp
Updated hierarchical facet client code.
Added scripts to index.jsp
Fixed serialization code for hierarchy entries that differed from client assumptions.
Added missing JSONObject import.