Update HDL and improve UART speed.

This updates the HDL and improves the UART speed significantly.
Rebuild application every time.
Added simulation model and compile script.
Fixed transmit timing out.
Fixed up reception and transmission.
Add signal mux.

Now muxing between internal signal generator and LMS6002D receiver.
Fixed up wrong default value for LMS.
Bump the firmware revision.
Bump version and remove FPGA fixup.
Selectively enable RF module.
More tweaks.  Still times out.
Reset.