add migrations

migrations/db.js

@@ -0,0 +1,23 @@
+'use strict';
+
+var pg = require('pg');
+var async   = require('async');
+
+// TODO: generalize
+var conString = 'psql://lamassu:lamassu@localhost/lamassu';
+
+exports.query = function query(sql, cb) {
+  exports.multi([sql], cb);
+};
+
+exports.multi = function multi(sqls, cb) {
+  pg.connect(conString, function(err, client, done) {
+    if (err) throw err;
+
+    async.eachSeries(sqls, client.query.bind(client), function(err) {
+      done(true);
+      if (err) throw err;
+      cb();
+    });
+  });
+};