update minor version - huge performance improvements - recommended upgrade

Author: brianc

package.json

@@ -1,5 +1,5 @@
 { "name": "pg",
-  "version": "0.3.3",
+  "version": "0.4.0",
   "description": "PostgreSQL client - pure javascript & libpq with the same API",
   "keywords" : ["postgres", "pg", "libpq", "postgre", "database", "rdbms"],
   "homepage": "http://github.com/brianc/node-postgres",