updated readme
updated readme

nicholasleblanc/calendar,danieljacobarcher/calendar,FelixZhang00/calendar,nicholasleblanc/calendar,Magicline/calendar,FelixZhang00/calendar,danieljacobarcher/calendar,Baremetrics/calendar,theodorejb/calendar,Magicline/calendar,KonishiLee/calendar,theodorejb/calendar,Baremetrics/calendar,KonishiLee/calendar