Log Message:
Version 1.15.1 (released 2014-03-12)

* Add -6 and -8 flags to ykchalresp to output the response as a truncated
OATH code.
* Add -t to ykchalresp to use current time / 30 as challenge in TOTP
fashion.
* Fix for a crash in the libusb-0.1 backend.

Version 1.15.0 (released 2014-01-10)

* add new Neo version 3.2 as supported.
* let ykp_AES_key_from_password() return error if it can't get a random
  salt.
* let -a without option mean ask for raw key on STDIN.
* let no -a given mean generate a random key
* add ykp_AES_key_from_raw() and ykp_HMAC_key_from_raw() that sets the
key from a byte array.
* remove -osalt= and possibility to generate key from password.
* add YK_ENODATA that's returned when no data is returned from
  the device and no other underlying error is set.