Attempt to fix search.json file not found errors

- Add BASE_URL variable to scripts.html _include to create an absolute URL in search.js for search.json

_includes/scripts.html

@@ -1,3 +1,7 @@
+<script type="text/javascript">
+  var BASE_URL = '{{ site.url }}';
+</script>
+
 <script src="//ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js"></script>
 <script>window.jQuery || document.write('<script src="{{ site.url }}/assets/js/vendor/jquery-1.9.1.min.js"><\/script>')</script>
 <script src="{{ site.url }}/assets/js/scripts.min.js"></script>

assets/js/plugins/search.js

@@ -96,7 +96,7 @@ function toggleLoadingClass() {
  * @return null
  */
 function getSearchResults(callbackFunction) {
-    $.get(jsonFeedUrl, callbackFunction, 'json');
+    $.get(BASE_URL + jsonFeedUrl, callbackFunction, 'json');
 }