Unmute thread on direct mention or team mention

Since we need to process muted threads, we can't just search the inbox
anymore. Instead, let's process messages in the inbox *and* all muted
messages that were created in the past day. This approach will allow us
to still process new messages as they come in.
Try to avoid using up all compute cycles

When running this script every minute, I got this error a few times:

  Service invoked too many times in a short time: gmail rateMax.

And then I eventually got this error:

  Service invoked too many times for one day: gmail.

After getting those errors, I applied this change to the script, and
it's been running with this change in place for a week. I haven't seen
those errors since applying this change, so let's hope that this issue
is resolved.
Regenerate octogas.gs
Merge pull request #1 from jasonrudolph/unmute-on-mention

Unmute thread when you get @mentioned