* Version 3.0.0 (released 2016-04-11)
 ** Added support for Python 3.3+.
 ** utils.rand_bytes() now sources bytes from os.urandom().
 ** utils.websafe_encode() now returns text strings (unicode() on Python 2.x,
    str() on Python 3.x).
 ** utils.H() has been removed (just use hashlib.sha256() directly instead).
 ** soft.SoftU2FDevice() now stores keys, key handles and app params as text
    strings.
 ** Replace M2Crypto with Cryptography.

* Version 2.2.1 (released 2015-09-08)
 ** Fix setup.py so that installation works properly.
 ** Packaging related improvements.

* Version 2.2.0 (released 2015-07-01)
 ** License change: Changed license to BSD 2-clause.
 ** Check both usage page and usage.
 ** Prefer hidraw backend over libusb, if available.

* Version 2.1.0 (released 2015-04-13)
 ** Use usage page based filtering if possible.
 ** Added support for newer YubiKey devices.
 ** Fix majorVersion in AppID facet verification.

* Version 2.0.1 (released 2014-10-28)
 ** Ignore failures while listing devices, as other transport might be working.
 ** Support for Security Key by Yubico

* Version 2.0.0 (released 2014-09-26)
 ** Updated to U2F_V2 standard.
 ** Removed old draft versions.

* Version 1.1.0 (released 2014-04-15)
 ** Added support for the HID transport.

* Version 1.0.0 (released 2014-02-18)
 ** First public release.
 ** Added support for U2F_V2.
 ** Added soft U2F device for testing purposes.

* Version 0.0.2 (released 2013-10-07)
 ** Better instructions in README
 ** Includes executables missing from 0.0.1

* Version 0.0.1 (released 2013-08-22)
 ** Initial internal release!
