Update the sample to be more generic.

Author: creationix

sample.js

@@ -1,7 +1,7 @@
 var sys = require("sys");
 var Postgres = require('./postgres')
 
-var db = new Postgres.Connection("land", "enterprisedb", "enterprisedb");
+var db = new Postgres.Connection("database", "username", "password");
 process.ARGV.slice(2).forEach(function (sql) {
   sys.puts(sql)
   db.query(sql, function (data) {