- Corrected argument specification for `transform` extension callbacks, fixing `AnnotationExtension` usage as per 163.
- Additional source-level documentation and expanded examples.
- An excessively large number of additional WSGI server adapters; now supported are: [waitress](http://s.webcore.io/aIou), [tornado](http://s.webcore.io/aIaN), [fcgi](http://s.webcore.io/fhVY), [cherrypy](http://s.webcore.io/aIoF), [appengine](http://s.webcore.io/aIic), [paste](http://s.webcore.io/aIdT), [eventlet](http://s.webcore.io/aIaa), [gevent](http://s.webcore.io/aIpU), [diesel](http://s.webcore.io/aIg2), and [bjoern](http://s.webcore.io/aIne). Each is available as an `extras_require` by the same name which will pull in the required third-party dependency.