Fix typo in readme.  Seaweed, not cheesy pretzels.
Fix typo in readme.  Seaweed, not cheesy pretzels.

galaxyproject/pulsar,ssorgatem/pulsar,natefoo/pulsar,jmchilton/pulsar,natefoo/pulsar,ssorgatem/pulsar,galaxyproject/pulsar,jmchilton/pulsar