convert all non-verbose Serial.print to sp, reformatting as necessary
add mesh.from, mesh.calibrate, mesh.each, and unify lastMesh*
add dumb flash wrapper around delay
slight calibration fixes
experimentally allow multiple commands at once
also turn off led when done
simpler mesh flush command
update the float printer and make avail, use in a volts command
Merge pull request #174 from Pinoccio/serialprintless

never Serial.print (except verbose), print floats, pin.status json and power.volts
Merge branch 'master' of https://github.com/Pinoccio/library-pinoccio into meshcalibrate
make it a bit faster, blinkier, and more sensitive
Merge pull request #175 from Pinoccio/meshcalibrate

mesh.calibrate(seconds) utility
Merge branch 'master' of https://github.com/Pinoccio/library-pinoccio into persist