fix install issues with node v0.12 #19

app.js

@@ -5,7 +5,6 @@ var path = require('path');
 var ws = require('websocket').server;
 var pty = require('pty.js');
 var fs = require('fs');
-var waitpid = require('waitpid');
 
 var opts = require('optimist')
     .options({

package.json

@@ -4,9 +4,8 @@
     "dependencies": {
         "express": "3.5.1",
         "websocket": "^1.0",
-        "pty.js": "git+https://github.com/terryschen/pty.js",
+        "pty.js": "^0.2.7-1",
-        "optimist": "^0.6",
+        "optimist": "^0.6"
-        "waitpid": "^0.1"
     },
     "devDependencies": {
         "load-grunt-tasks": "^3.0",