shorten url cache state in a javascript variable, and leave on information about the current entity in the URL hash params

https://fedorahosted.org/freeipa/ticket/674

decrement depth for hidden tabs.

Initialize state from url
useing delete for removing state
stricter attribute matching
not incrementing depth for all hidden tabs.
whitespace cleanup

install/ui/test/details_tests.js

@@ -35,6 +35,12 @@ module('details', {
             }
         );
 
+        IPA.nav = {};
+
+        IPA.nav.get_state = function(key){
+            return $.bbq.getState(key);
+        };
+
         details_container = $('<div id="details"/>').appendTo(document.body);
 
         var obj_name = 'user';