Minimal work queue in postgres.

npm install postorder

var client = require('postorder').create('pg://localhost/db');
client.send({ my: 'word' });

var client = require('postorder').create('pg://localhost/db');
client.listen(function (err, msg) {
  if(err) throw err;
  console.log(msg.my); //> 'word'
});

// you can also use shift to only take a single work item.
client.shift(function (err, msg) { });