add nginx child process

ts/smartnginx.plugins.ts

@@ -1,5 +1,7 @@
 import "typings-global";
+export import beautylog = require("beautylog");
 export import cert = require("cert");
+export import childProcess = require("child_process");
 export import path = require("path");
 export import q = require("q");
 export let shelljs = require("shelljs");