Fixed: Applications or middleware that didn't call the WSGI
start_response function before returning an iterator weren't handled
properly.
Added more test conditions to generator_apps
Merge remote-tracking branch 'origin/master' into handle-late-start-response

And added missing changes entry

Conflicts:
	src/zc/resumelb/tests.py
fix typos
Merge pull request #7 from zopefoundation/handle-late-start-response

Handle late start response