* Prepare for distutils.version being removed in Python 2.12.
* Fix copy'n'paste error.
* Re-add Loose prefix.
* Fix Python version typo.
* Improve formulation.
* Move message into own line.
* Fix casing, now that the object is no longer called Version.
* Refactoring openssh_keypair for multiple backends
* Fixing cryptography backend validations
* Simplifying conditionals and excess variable assignments
* Fixing docs and adding cleanup for integration tests
* Fixing docs and public key validation bugs in crypto backend
* Enhancing cryptogagraphy utils to raise OpenSSHErrors when file not found
* Adding missed copyright and cleanup for idempotency test keys
* Fixing doc style
* Readding crypto/openssh for backwards compatibility
* Adding changelog fragment and final simplifications of conditional statements
* Applied initial review suggestions
Felix Fontein
Ajpantuso