ykpers 1.13.0

[Simon Josefsson]

Hi. We just released ykpers version 1.13.0 with support for a
JSON-based configuration format, YCFG. Also uploaded to Debian.

http://yubico.github.io/yubikey-personalization/

/Simon

* Version 1.13.0 (released 2013-04-22)

** Added import/export of ycfg-json format.
Invoke with -fjson to -s or -i
Add exported functions ykp_export_config() and ykp_import_config()

** Fixup output of flags when using ykp_write_config()

** Add binary builds for mac.