Re-organise node structure and loading to make things somewhat more

simple. This also adds the ability to display servers on the treeview.

web/pgadmin/utils/ajax.py

@@ -0,0 +1,28 @@
+##########################################################################
+#
+# pgAdmin 4 - PostgreSQL Tools
+#
+# Copyright (C) 2013 - 2015, The pgAdmin Development Team
+# This software is released under the PostgreSQL Licence
+#
+##########################################################################
+
+"""Utility functions for dealing with AJAX."""
+
+from flask import Response
+import json
+
+def make_json_response(success=1, errormsg='', info='', result={}, data={}):
+    """Create a HTML response document describing the results of a request and
+    containing the data."""
+    doc = { }
+    doc['success'] = success
+    doc['errormsg'] = errormsg
+    doc['info'] = info
+    doc['result'] = result
+    doc['data'] = data
+
+    response = Response(response=json.dumps(doc),
+                        status=200,
+                        mimetype="text/json")
+    return response