utility queue-json to publish an arbitrary json blob to amqp
make drain-queue output actual json instead of python dict syntax
Merge pull request #31 from nlevitt/drain-republish

new utility queue-json, and another change to help with draining from and republishing to amqp
apache license
add license section
Merge remote-tracking branch 'internetarchive/master' into ari-3774
Improve formatting.