All the necessary things for setup.py to build cffi stuff
six is now required at build time
Some flake8 fixes
Merge branch 'master' into setup-install-extension

Conflicts:
	setup.py
Explanatory comment
Merge branch 'master' into setup-install-extension

Conflicts:
	cryptography/hazmat/bindings/openssl/binding.py
Re-add the ext_package decleration to the moved verify() call
Check to see if a binding is available before trying to install it
flake8
Write release automation software. Fixes #375
Boilerplate woo!
Fix
Suggestion from @dreid
Simplify
Fix
Update procedure
Merge branch 'master' into release-automation
Update release docs
This is a dev dep
You need a gpg key to do a release