Add "Formula for modified card frequencies" to kingdom generator.

[As requested in the first reply in the thread](http://forum.dominionstrategy.com/index.php?topic=11749.msg417072#msg417072).

Additionally, `GS.template()` always calls `GS.debug()`, and the HTML for the kingdom generator is in its own template, rather than a messy js string.

I didn't change any versioning anywhere, @aiannacc will probably want that changed before releasing?