Lets limit the age of any branch beside main and gh-pages to max a week

[alterisian]

As a mob, we can work on main.

However sometimes other branches come into existance. Lets make sure they do not live too long, and merge them after a week.

Will merge availability_tweet soon.

This will keep confusion down, and make it more obvious where we should mob.

[alterisian]

Old availability_tweet branch now merged.
Should probably have the 'policy' aspect in the readme.