esp8266/modmachine: Add Signal class.
esp8266/modmachine: Add Signal class.

alex-robbins/micropython,lowRISC/micropython,SHA2017-badge/micropython-esp32,Timmenem/micropython,alex-robbins/micropython,adafruit/micropython,puuu/micropython,Timmenem/micropython,blazewicz/micropython,tralamazza/micropython,trezor/micropython,chrisdearman/micropython,deshipu/micropython,PappaPeppar/micropython,pramasoul/micropython,dmazzella/micropython,chrisdearman/micropython,henriknelson/micropython,torwag/micropython,HenrikSolver/micropython,trezor/micropython,MrSurly/micropython,pramasoul/micropython,SHA2017-badge/micropython-esp32,chrisdearman/micropython,AriZuu/micropython,deshipu/micropython,adafruit/circuitpython,henriknelson/micropython,micropython/micropython-esp32,tralamazza/micropython,lowRISC/micropython,torwag/micropython,puuu/micropython,infinnovation/micropython,swegener/micropython,lowRISC/micropython,adafruit/micropython,ryannathans/micropython,micropython/micropython-esp32,pfalcon/micropython,HenrikSolver/micropython,swegener/micropython,henriknelson/micropython,puuu/micropython,selste/micropython,TDAbboud/micropython,kerneltask/micropython,dmazzella/micropython,adafruit/micropython,hiway/micropython,ryannathans/micropython,ryannathans/micropython,MrSurly/micropython,HenrikSolver/micropython,adafruit/micropython,AriZuu/micropython,adafruit/circuitpython,cwyark/micropython,puuu/micropython,adafruit/circuitpython,toolmacher/micropython,tobbad/micropython,adafruit/circuitpython,cwyark/micropython,Peetz0r/micropython-esp32,MrSurly/micropython,AriZuu/micropython,adafruit/micropython,bvernoux/micropython,chrisdearman/micropython,pozetroninc/micropython,oopy/micropython,pfalcon/micropython,PappaPeppar/micropython,micropython/micropython-esp32,HenrikSolver/micropython,TDAbboud/micropython,toolmacher/micropython,cwyark/micropython,henriknelson/micropython,tralamazza/micropython,HenrikSolver/micropython,mhoffma/micropython,MrSurly/micropython-esp32,adafruit/circuitpython,torwag/micropython,blazewicz/micropython,oopy/micropython,PappaPeppar/micropython,pozetroninc/micropython,selste/micropython,blazewicz/micropython,blazewicz/micropython,pozetroninc/micropython,trezor/micropython,TDAbboud/micropython,henriknelson/micropython,MrSurly/micropython-esp32,bvernoux/micropython,cwyark/micropython,TDAbboud/micropython,mhoffma/micropython,oopy/micropython,mhoffma/micropython,bvernoux/micropython,MrSurly/micropython-esp32,cwyark/micropython,tobbad/micropython,MrSurly/micropython-esp32,micropython/micropython-esp32,selste/micropython,pfalcon/micropython,infinnovation/micropython,PappaPeppar/micropython,oopy/micropython,pfalcon/micropython,MrSurly/micropython,Peetz0r/micropython-esp32,tobbad/micropython,alex-robbins/micropython,micropython/micropython-esp32,trezor/micropython,kerneltask/micropython,bvernoux/micropython,bvernoux/micropython,SHA2017-badge/micropython-esp32,pramasoul/micropython,alex-robbins/micropython,mhoffma/micropython,dmazzella/micropython,trezor/micropython,swegener/micropython,AriZuu/micropython,deshipu/micropython,infinnovation/micropython,pozetroninc/micropython,PappaPeppar/micropython,tobbad/micropython,tralamazza/micropython,mhoffma/micropython,adafruit/circuitpython,TDAbboud/micropython,hiway/micropython,Peetz0r/micropython-esp32,MrSurly/micropython-esp32,hiway/micropython,toolmacher/micropython,lowRISC/micropython,lowRISC/micropython,ryannathans/micropython,selste/micropython,SHA2017-badge/micropython-esp32,MrSurly/micropython,Timmenem/micropython,pramasoul/micropython,SHA2017-badge/micropython-esp32,pozetroninc/micropython,tobbad/micropython,puuu/micropython,ryannathans/micropython,pfalcon/micropython,toolmacher/micropython,Timmenem/micropython,toolmacher/micropython,deshipu/micropython,kerneltask/micropython,hiway/micropython,Peetz0r/micropython-esp32,Peetz0r/micropython-esp32,chrisdearman/micropython,swegener/micropython,torwag/micropython,oopy/micropython,alex-robbins/micropython,kerneltask/micropython,blazewicz/micropython,swegener/micropython,torwag/micropython,deshipu/micropython,infinnovation/micropython,hiway/micropython,selste/micropython,infinnovation/micropython,pramasoul/micropython,Timmenem/micropython,kerneltask/micropython,AriZuu/micropython,dmazzella/micropython