config space IO
  silent readback

Uniformity is best.

- added overflow protection in case new packets arrive while WB slave takes
long to answer requests
 

TODO: fix long delayed ack problem

fixed write address bug

-TODO: tidy state WB_WRITE and WB_READ code

timestamp latch unit and package declaration for sdwb

A few comments were out of date.

This is faster in a high throughput scenario.

In compact mode, print '---' for unplugged device.

Fix potential buffer overrun.

Of course, we need to combine the length and payload fields for UDP tunneled over TCP now.

Functions: Latches a timestamp when the selected edge (+/-) is detected on
an active  trigger channel. 1..32 seperate channels and buffers, 
fifo fill count can be read for burst read.

TODO: Fix address map

strace is beautiful now...

Switch to a better approach to integrating the main loop.
This will support testing for readiness before needlessly running a kernel call.