Watersens Shield Prototype Design update

improvements:
remove gnd_iso from reg sync pin - ok
reassign arduino pins for softserial sketch (E line from pin 10 to Pin
4, TX from 9 to 11, RX from 8 to 10)
remove I2C RX TX jumpers - ok
reannotate jumpers - ok
move components left - ok
add ground planes - ok
move si8600 to square or horizontal layout - ok
increase size of BNC traces - ok
rename altserial datatypes/objects - ok
replace reg with compact one - ok
check large(ish) cap size -ok

remaining task:
re-routing