add freewheeling diodes, working on 32u2 layout,

start adding icoupler
finish icoupler addition, remove ps-select jumper
rotate motor and serial ext for easier wave solder
final connector move, change mount hole for wave

fix drc and silk errors, misc fixes
fix gnd fence
change thieve style, rst-en trace added back,

DTR resistor now pull up - now back to original usb reset behaviour of
Rambo
remove solder pads under mount holes
remove stale file
rework psu layout, improve decoupling