Refresh log debugging docs

This documents how to gzip all the logs before sending a support request
and how to tail all of the ER's web workers.

One could also use `docker exec -t -i CONTAINER /bin/bash` and you don't even need to be on the host machine to tail the logs. It's only really useful when using boot2docker, though.
Just ask the user to run the script located at .... The difference being that they download and verify the script before running it.