PEP8 style issues fixed

Well, I muted the "E501 line too long (82 > 79 characters)"
ones since they don't belong in 2014.
Showing all queues that are critical/warning/ok

Previously, it showed the first that failed.
Setting proper exit codes
Merge pull request #4 from boivie/show-all

Showing all queues that are critical/warning/ok