Wifi Capability

Adds very basic wifi support (proof of concept)
Adds a better command line
Uses three ports (each either USB or network) ... command-line and debug is on the third.

Added UART support

Includes support for UART (on pins 4 and 5) as per picoprobe.

Very Early Testing

A very early release to see if there's any interest, please treat with care, this is by no means properly tested.