Fri Apr 8 14:32:08 EDT 2011

PK2 done

I've got the PK2 interface running reasonably reliably with asynch log
display from PIC.  Still some quirks that I expect to be either PK2
bugs, or improper PK2 init or error handling.

So, time to tackle the USB.

Let's stick to the previous organization:

  - Low level communications driver: handles all USB responses and

  - High level protocol: construction of per-device descriptors and