[pcb] New PCB layout CanShark v2.0

This layout has been based on Jakub Skalicky's V10 layout.
The main differences are:

* Size of the board truncated to be fabricated in ITEAD studio.
* Power supply scheme changed, only power from application is enabled.
* Removed analog measurement because it was currently not used in software
* Added synchronization port (possible input or output with TTL 3.3V level to trig scope meter)
* Hammond plastic box can be used.