Fix for api breaking changes as return values from create table chang…

…ed from created to tables_created

remodel/utils.py

@@ -16,7 +16,7 @@ def create_tables():
 
     for model_cls in model_registry.all().values():
         result = r.table_create(model_cls._table).run()
-        if result['created'] != 1:
+        if result['tables_created'] != 1:
             raise RuntimeError('Could not create table %s for model %s' % (
                                model_cls._table, model_cls.__name__))