Add a note about write issues 
Add a note about write issues 

when writing to a recently opened Arduino port.
node-serialport/node-serialport,munyirik/node-serialport,giseburt/node-serialport,EmergingTechnologyAdvisors/node-serialport,ms-iot/node-serialport,node-serialport/node-serialport,node-serialport/node-serialport,ms-iot/node-serialport,voodootikigod/node-serialport,rhuehn/node-serialport,voodootikigod/node-serialport,voodootikigod/node-serialport,tigoe/node-serialport,EmergingTechnologyAdvisors/node-serialport,giseburt/node-serialport,munyirik/node-serialport,EmergingTechnologyAdvisors/node-serialport,EmergingTechnologyAdvisors/node-serialport,node-serialport/node-serialport,ms-iot/node-serialport,ms-iot/node-serialport,rhuehn/node-serialport,tigoe/node-serialport,ms-iot/node-serialport,rhuehn/node-serialport,tigoe/node-serialport,voodootikigod/node-serialport,node-serialport/node-serialport,munyirik/node-serialport,rhuehn/node-serialport,munyirik/node-serialport,tigoe/node-serialport,giseburt/node-serialport,giseburt/node-serialport,EmergingTechnologyAdvisors/node-serialport