1. Implemented the backend for accepting shorter urls for visualizations. This partially implements the feature described here http://issues.library.cornell.edu/browse/NIHVIVO-1097

2. Changed the IndividualTemplateModel to render shorter vis urls for temporal graph & ego-centric networks.
3. changed main toggle visualization links in ego-centric networks to use shorter vis urls.

webapp/src/edu/cornell/mannlib/vitro/webapp/controller/freemarker/UrlBuilder.java

@@ -46,6 +46,7 @@ public class UrlBuilder {
         SITE_ADMIN("/siteAdmin"),
         TERMS_OF_USE("/termsOfUse"),
         VISUALIZATION("/visualization"),
+        VISUALIZATION_SHORT("/vis"),
         VISUALIZATION_AJAX("/visualizationAjax"),
         VISUALIZATION_DATA("/visualizationData");