Add blacklist for locales  (#309)

This is for issue #309. I added here the changes for the pulse script and also the blacklist for staging beta and release, for testing. So as discussed, the blacklist will have priority when there are both.
You do not check if `locales` is really present first. So this will raise an exception if no `locales` are specified. Maybe its better to add additional if conditions for each possible blacklist.