Pyramid 1.6.1 bugfix released

[Michael Merickel]

Hey folks. There have been very few reports of problems with the 1.6 series so far but there was a regression with ``pyramid.session.check_csrf_token`` failing when checking header values that I wanted to get out there.

The full changelog is available here:

http://docs.pylonsproject.org/projects/pyramid/en/1.6-branch/changes.html#changes-1-6-1

Enjoy, and please report any issues you find to the issue tracker at
<https://github.com/Pylons/pyramid/issues>

Thanks!