Do not use kukit-devel.js in the tracker.

It is nice for debugging when you are developing on the tracker, but
not in production.

I updated to Firefox 30 and Firebug 2.0 today and the tracker gave a
javascript error for kukit-devel.js:

  TypeError: 'log' called on an object that does not implement interface Console.

It did work when I actually enabled Firebug.

Bonus: now it works on Safari too.
Preparing release 1.0.8
Back to development: 1.0.9