Adds a button to add upcoming hololive streams on Holodex to Google Calendar
目前為 2021-05-20 提交的版本，檢視 最新版本。
這裡只顯示彼此間有代碼差異的版本。 顯示所有版本。
Fixed to work with new UI update
for some reason, update button didn't update to the latest so i'm doing this again.
stream more than 24 hours should work... maybe
works for the holodex site without the /home/ thing
