Added support for documenting event classes.

Expects an event loading function that should return a list of event classes for a given service class.
Merge branch 'master' into nameko_event_doc
Updated to v1.8.2
Merge pull request #135 from onefinestay/nameko_event_doc

Added support for documenting event classes
Merge remote-tracking branch 'origin/master' into rpc-timeout-bugfix

Conflicts:
	CHANGES
	setup.py