Allow transforming to any format

This changes around `utils/use_require.js` to be able to generate any
of AMD (RequireJS), CommonJS, SystemJS, or UMD modules.  The three
former also include support for translating `vnc.html`, producing a full
"app" version of noVNC.

package.json

@@ -9,8 +9,7 @@
   },
   "scripts": {
     "test": "PATH=$PATH:node_modules/karma/bin karma start karma.conf.js",
-    "prepublish": "node ./utils/use_require.js --as-require",
-    "build-es6": "node ./utils/use_require.js"
+    "prepublish": "node ./utils/use_require.js --as commonjs"
   },
   "repository": {
     "type": "git",
@@ -29,10 +28,14 @@
   "homepage": "https://github.com/kanaka/noVNC",
   "devDependencies": {
     "ansi": "^0.3.1",
+    "babel-core": "^6.22.1",
     "babel-plugin-add-module-exports": "^0.2.1",
+    "babel-plugin-transform-es2015-modules-amd": "^6.22.0",
     "babel-plugin-transform-es2015-modules-commonjs": "^6.18.0",
-    "babelify": "^7.3.0",
+    "babel-plugin-transform-es2015-modules-systemjs": "^6.22.0",
+    "babel-plugin-transform-es2015-modules-umd": "^6.22.0",
     "browser-es-module-loader": "^0.4.1",
+    "babelify": "^7.3.0",
     "browserify": "^13.1.0",
     "casperjs": "^1.1.3",
     "chai": "^3.5.0",
@@ -55,7 +58,6 @@
     "sinon": "^1.17.6",
     "sinon-chai": "^2.8.0",
     "spooky": "^0.2.5",
-    "temp": "^0.8.3",
-    "through2": "^2.0.1"
+    "temp": "^0.8.3"
   }
 }