[bugfix,js][xs]: make sure we do *not* genshi HTML escape json packag…

…e and resource data we are inserting into pages (dataset edit and resource read).

* Had run into this via an odd bug whereby a resource url that was an html page was not previewing and reason was & had been converted to &

ckan/templates/package/edit.html

@@ -10,7 +10,7 @@
 
   <py:def function="optional_head">
     <script>
-      var preload_dataset = ${c.pkg_json};
+      var preload_dataset = ${h.literal(c.pkg_json)};
     </script>
   </py:def>
 

ckan/templates/package/resource_read.html

@@ -17,7 +17,7 @@
     <link rel="stylesheet" href="${h.url_for('/scripts/vendor/recline/css/graph-flot.css')}" />
     <!-- /data preview -->
     <script type="text/javascript">
-      var preload_resource = ${c.resource_json};
+      var preload_resource = ${h.literal(c.resource_json)};
     </script>
   </py:def>