• Adds support for returning CORS headers with uncaught exceptions in production so 500s will have expected CORS headers set. This will allow clients to better surface the errors, rather than failing due to security. Reported and tested by @robertfw -- thanks!
• Improved conformance of preflight request handling to W3C spec.
• Code simplification and 100% test coverage 😎

• Improves API consistency, allowing a CORS resource of '*'
• Improves documentation of the CORS app extension
• Fixes test import errors on Python 3.4.1 (Thanks @wking )

Thanks to @wking's work in PR #71 python setup.py test will now work.

Adds support for regular expressions in the list of origins.

This allows subdomain wildcarding and should be fully backwards compatible.

Credit to @marcoqu for opening #54 which inspired this work