def get_me(exc_type):
            yield 2
            yield 4
            raise exc_type()
added `swallow_exception` to `log_exception`

* v2.1

* travis - don't use python 2.7

* fix not to use six

* NoReturn removed

* doc fix

* ported configuration section from metapod

* can load config schema from a dict now

* .convert() -> .__call__