Wrap default responders with global hooks wrt #223

This enables global hooks for OPTIONS and Method Not Allowed (405)
default responses. This fixes issues with CORS preflight OPTIONS
requests not getting correct headers set by custom hooks.
Drop blank lines to fix flake8 complaints wrt #233
Merge pull request #238 from sebasmagri/global-hooks-for-default-responders

Wrap default responders with global hooks wrt #233