Stable (or at least it really looks that way) but not quite synchronous

Stable (or at least it really looks that way) but not quite synchronous
All crashes (3 sofar) of trbnet have been solved with 'trbcmd reset'.

Changes to soda:
- The source now has a tx-fifo (fixed delay) but NO rx-fifo.
- Both sides have a watchdog implemented. It checks 'got_link_ready'. If this is absent the watchdog fires and resets the rx-control fsm.
- Calibration works with: 'trbcmd w 0xf355 0xbe00 0x40000000;trbcmd w 0xf355 0xbe00 0x00000000; trbcmd r 0xf355 0xbe02'
- The client still has an rx-fifo ; this will be next to go.