Log Message:
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.
* Minor cleanups noticed during debian packaging.

Version 1.12.0 (released 2013-03-14)

* Recognize firmwares 2.4 and 3.1.
* Add support for setting the new extflag LED_INV
  When set the behaviour of the led on the YubiKey is inversed.

(Moved HOMEPAGE and MASTER_SITES to the new GitHub project URLs)