Fix bug #11

Correct RestSession.get_items() to check for the existence of a JSON
‘items’ attribute by checking to see  ‘if items is None’ instead of
just checking for ‘if items’, which incorrectly raises the error when
‘items’ is present but is an empty array.

ciscosparkapi/restsession.py

@@ -144,13 +144,13 @@ def get_items(self, url, params=None, **kwargs):
             # objects contained within the top level 'items' array
             assert isinstance(json_page, dict)
             items = json_page.get(u'items')
-            if items:
-                for item in items:
-                    yield item
-            else:
+            if items is None:
                 error_message = "'items' object not found in JSON data: " \
                                 "{!r}".format(json_page)
                 raise ciscosparkapiException(error_message)
+            else:
+                for item in items:
+                    yield item
 
     def post(self, url, json, **kwargs):
         # Process args