Clean GET params in ajax calls

- Use `data` arg of `$.getJSON` for `format` param
- Delete `dictToArray` call on data returned by `SingleResumeStat` class view since this view now returns stats manifest as an array

kfet/static/kfet/js/statistic.js

@@ -42,8 +42,7 @@
             $(this).addClass("focus");
 
             // loads data and shows it
-            $.getJSON(this.stats_target_url + "?format=json",
-                      displayStats);
+            $.getJSON(this.stats_target_url, {format: 'json'}, displayStats);
         }
 
         function displayStats (data) {
@@ -158,7 +157,7 @@
                          "aria-label": "select-period"});
 
             var to_click;
-            var context = dictToArray(data.stats);
+            var context = data.stats;
             
             for (var i = 0; i < context.length; i++) {
                 // creates the button
@@ -191,7 +190,7 @@
 
         // constructor
         (function () {
-            $.getJSON(url + "?format=json", initialize);
+            $.getJSON(url, {format: 'json'}, initialize);
         })();
     };
 })(jQuery);