Use SwaggerJS from npm

* Uses npm to download latest swagger-js (for now. When swagger-js is
   released we will replace git address with actual swagger-ui)

* Uses `postinstall` to generate `browser` folder of swagger-ui. This
 can go when swagger-ui is published.

package.json

@@ -9,7 +9,8 @@
     "build": "./node_modules/gulp/bin/gulp.js;",
     "serve": "./node_modules/gulp/bin/gulp.js serve;",
     "pretest": "jshint .",
-    "test": "./node_modules/gulp/bin/gulp.js; ./node_modules/mocha/bin/mocha"
+    "test": "./node_modules/gulp/bin/gulp.js; ./node_modules/mocha/bin/mocha",
+    "postinstall": "cd node_modules/swagger-client/; npm install; gulp"
   },
   "repository": {
     "type": "git",
@@ -43,6 +44,7 @@
     "http-server": "git+https://github.com/nodeapps/http-server.git",
     "less": "^2.4.0",
     "mocha": "^2.1.0",
-    "selenium-webdriver": "^2.45.0"
+    "selenium-webdriver": "^2.45.0",
+    "swagger-client": "git://github.com/swagger-api/swagger-js#develop_2.0"
   }
 }