adding xterm comparison tests

package.json

@@ -1,18 +1,24 @@
 {
   "name": "xterm",
   "version": "0.33.0",
-  "ignore": ["demo", "test", ".gitignore"],
+  "ignore": [
+    "demo",
+    "test",
+    ".gitignore"
+  ],
   "main": "src/xterm.js",
   "repository": "https://github.com/sourcelair/xterm.js",
   "license": "MIT",
   "devDependencies": {
+    "chai": "3.5.0",
+    "docdash": "0.4.0",
     "express": "4.13.4",
     "express-ws": "2.0.0-rc.1",
-    "pty.js": "0.3.1",
-    "mocha": "2.5.3",
-    "chai": "3.5.0",
+    "glob": "^7.0.5",
     "jsdoc": "3.4.0",
-    "docdash": "0.4.0"
+    "mocha": "2.5.3",
+    "pty.js": "0.3.0",
+    "sleep": "^3.0.1"
   },
   "scripts": {
     "start": "node demo/app",