Added support for Duet AI license.
Added `api_call_tries_limit` variable to `gam.cfg` that limits the number of tries
for Google API calls that return an error that indicates a retry should be performed. The default value is 10 and the range of allowable values is 3-10.
Code cleanup for retry loops
Initial (not announced, in preview mode) code for Chat API support of group members and role management
Allow spaces/xxx and space/xxx when specifying chat spaces
