--- features: - Added new functionality for showing and listing stack outputs without resolving all outputs during stack initialisation. - Added new API calls for showing and listing stack outputs ``/stack/outputs`` and ``/stack/outputs/output_key``. - Added using of new API in python-heatclient for ``output_show`` and ``output_list``. Now, if version of Heat API is 1.19 or above, Heat client will use API calls ``output_show`` and ``output_list`` instead of parsing of stack get response. If version of Heat API is lower than 1.19, outputs resolve in Heat client as well as before.