Flask-cors

* 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 :sunglasses:

* 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 https://github.com/wcdolphin/flask-cors/pull/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 https://github.com/wcdolphin/flask-cors/issues/54 which inspired this work

Earlier
Prior version numbers were not kept track of in this system.