- update to 0.13:
* Update documentation to refer to setuptools instead of distribute.
* Add pypy to the list of default test configurations.
* Include a work-around to avoid a cpython bug with atexit
* Deprecate TestExtensionManager and replace with make_test_instance()
class method to provide test classes that behave more like the
production class, while still allowing the extensions to be injected
for testing
* Fixes an exception when reporting on an error where multiple
drivers have the same name
* Switch packaging to use pbr. (forwarded request 209154 from dirkmueller)