Log Message:
Version 2.17 (released 2014-08-26)

* Fix a bug with the 'urllist' parameter where urls would be forgotten.
* Manpages converted to asciidoc.

Version 2.16 (released 2014-06-10)

* Fix a crashbug with the new parameter 'urllist'

Version 2.15 (released 2014-04-30)

* Added new parameter 'urllist'
* Added pam_yubico(8) man page.
* Fix memory leak.
* Bump yubico-c-client version requirement to 2.12.