Update swagger-js with latest

* For the e2e tests to run, we had to enable CORS in http-server.  The
  release of http-server that supports CORS hasn't come out yet so we
  have to use http-server@master until then.  Here is the commit I speak
  of: 30f4d1e008

package.json

@@ -41,7 +41,7 @@
     "gulp-util": "^3.0.4",
     "gulp-watch": "^4.1.1",
     "gulp-wrap": "^0.11.0",
-    "http-server": "^0.7.5",
+    "http-server": "git+https://github.com/nodeapps/http-server.git",
     "less": "^2.4.0",
     "mocha": "^2.1.0",
     "selenium-webdriver": "^2.45.0"