extmod/modwebsocket: Add readline method.
extmod/modwebsocket: Add readline method.

This goes bit against websocket nature (message-based communication),
as it ignores boundaries bertween messages, but may be very practical
to do simple things with websockets.

torwag/micropython,dmazzella/micropython,tobbad/micropython,tobbad/micropython,henriknelson/micropython,hiway/micropython,ganshun666/micropython,hosaka/micropython,Timmenem/micropython,SHA2017-badge/micropython-esp32,puuu/micropython,dmazzella/micropython,adafruit/micropython,hiway/micropython,TDAbboud/micropython,pozetroninc/micropython,dxxb/micropython,alex-march/micropython,infinnovation/micropython,torwag/micropython,henriknelson/micropython,alex-march/micropython,redbear/micropython,bvernoux/micropython,mhoffma/micropython,kerneltask/micropython,ganshun666/micropython,redbear/micropython,jmarcelino/pycom-micropython,HenrikSolver/micropython,MrSurly/micropython,matthewelse/micropython,redbear/micropython,toolmacher/micropython,hosaka/micropython,tuc-osg/micropython,adafruit/circuitpython,deshipu/micropython,SHA2017-badge/micropython-esp32,pfalcon/micropython,lowRISC/micropython,Peetz0r/micropython-esp32,adafruit/circuitpython,adafruit/circuitpython,swegener/micropython,chrisdearman/micropython,deshipu/micropython,Timmenem/micropython,MrSurly/micropython,puuu/micropython,tuc-osg/micropython,tobbad/micropython,SHA2017-badge/micropython-esp32,AriZuu/micropython,dxxb/micropython,hosaka/micropython,dxxb/micropython,AriZuu/micropython,lowRISC/micropython,kerneltask/micropython,cwyark/micropython,pramasoul/micropython,blazewicz/micropython,jmarcelino/pycom-micropython,turbinenreiter/micropython,swegener/micropython,PappaPeppar/micropython,PappaPeppar/micropython,pramasoul/micropython,dxxb/micropython,pozetroninc/micropython,ryannathans/micropython,HenrikSolver/micropython,SHA2017-badge/micropython-esp32,Timmenem/micropython,henriknelson/micropython,adafruit/circuitpython,toolmacher/micropython,MrSurly/micropython-esp32,ganshun666/micropython,selste/micropython,alex-robbins/micropython,mhoffma/micropython,hiway/micropython,cwyark/micropython,PappaPeppar/micropython,AriZuu/micropython,MrSurly/micropython,kerneltask/micropython,PappaPeppar/micropython,torwag/micropython,micropython/micropython-esp32,MrSurly/micropython-esp32,bvernoux/micropython,blazewicz/micropython,micropython/micropython-esp32,HenrikSolver/micropython,hosaka/micropython,matthewelse/micropython,lowRISC/micropython,Peetz0r/micropython-esp32,alex-robbins/micropython,MrSurly/micropython-esp32,adafruit/micropython,ryannathans/micropython,tralamazza/micropython,selste/micropython,bvernoux/micropython,blazewicz/micropython,pramasoul/micropython,cwyark/micropython,ryannathans/micropython,SHA2017-badge/micropython-esp32,turbinenreiter/micropython,puuu/micropython,oopy/micropython,swegener/micropython,ryannathans/micropython,Peetz0r/micropython-esp32,tuc-osg/micropython,Timmenem/micropython,mhoffma/micropython,puuu/micropython,deshipu/micropython,infinnovation/micropython,mhoffma/micropython,selste/micropython,swegener/micropython,infinnovation/micropython,alex-march/micropython,matthewelse/micropython,trezor/micropython,swegener/micropython,oopy/micropython,HenrikSolver/micropython,deshipu/micropython,Timmenem/micropython,HenrikSolver/micropython,alex-robbins/micropython,toolmacher/micropython,tralamazza/micropython,henriknelson/micropython,micropython/micropython-esp32,lowRISC/micropython,pfalcon/micropython,MrSurly/micropython,hosaka/micropython,adafruit/circuitpython,oopy/micropython,matthewelse/micropython,bvernoux/micropython,toolmacher/micropython,adafruit/circuitpython,tobbad/micropython,deshipu/micropython,oopy/micropython,adafruit/micropython,henriknelson/micropython,chrisdearman/micropython,pozetroninc/micropython,hiway/micropython,pfalcon/micropython,MrSurly/micropython-esp32,torwag/micropython,dxxb/micropython,selste/micropython,hiway/micropython,tralamazza/micropython,infinnovation/micropython,dmazzella/micropython,micropython/micropython-esp32,trezor/micropython,chrisdearman/micropython,adafruit/micropython,turbinenreiter/micropython,tobbad/micropython,alex-march/micropython,ganshun666/micropython,mhoffma/micropython,micropython/micropython-esp32,MrSurly/micropython-esp32,bvernoux/micropython,AriZuu/micropython,trezor/micropython,pramasoul/micropython,ryannathans/micropython,matthewelse/micropython,selste/micropython,infinnovation/micropython,pozetroninc/micropython,cwyark/micropython,adafruit/micropython,turbinenreiter/micropython,pfalcon/micropython,blazewicz/micropython,pramasoul/micropython,oopy/micropython,jmarcelino/pycom-micropython,tuc-osg/micropython,torwag/micropython,trezor/micropython,tralamazza/micropython,Peetz0r/micropython-esp32,redbear/micropython,kerneltask/micropython,chrisdearman/micropython,jmarcelino/pycom-micropython,ganshun666/micropython,TDAbboud/micropython,TDAbboud/micropython,AriZuu/micropython,redbear/micropython,tuc-osg/micropython,matthewelse/micropython,trezor/micropython,PappaPeppar/micropython,blazewicz/micropython,puuu/micropython,turbinenreiter/micropython,alex-robbins/micropython,jmarcelino/pycom-micropython,toolmacher/micropython,alex-march/micropython,pfalcon/micropython,kerneltask/micropython,pozetroninc/micropython,cwyark/micropython,dmazzella/micropython,TDAbboud/micropython,lowRISC/micropython,Peetz0r/micropython-esp32,alex-robbins/micropython,MrSurly/micropython,chrisdearman/micropython,TDAbboud/micropython