Reduce and change the help menu.
Implement fallback for pusher log messages

If we don't get any pusher messages with log updates after 5 seconds, we
will try to download them from the API.
Change link from mailing list to stack overflow.
Don't fetch missing log parts if test haven't started yet
Fix tests syntax
Merge pull request #301 from travis-ci/ps-pusher-timeout

Implement fallback for pusher log messages
Destroy parts object when leaving log