title: Unexpected value 'MdlModule' imported by the module 'AppModule'
body: <p>Just started experiencing this error after moving from angular2 Rc.5 to Final. I don't know what might be causing it, but i think its from the angular2-mdl package. Would be happy if someone can help me out.</p>
  
  <p>Here is the complete error message:</p>
  
  <pre><code>Uncaught Error: Unexpected value 'MdlModule' imported by the module 'AppModule'
  </code></pre>
  
  <p>Here are my packages:</p>
  
  <pre><code>"dependencies": {
  "@angular/common": "2.0.0",
  "@angular/compiler": "2.0.0",
  "@angular/core": "2.0.0",
  "@angular/forms": "2.0.0",
  "@angular/http": "2.0.0",
  "@angular/platform-browser": "2.0.0",
  "@angular/platform-browser-dynamic": "2.0.0",
  "@angular/router": "3.0.0",
  "@angular/upgrade": "2.0.0",
  "@angular2-mdl-ext/popover": "0.0.3",
  "@angular2-mdl-ext/select": "0.0.2",
  "angular2-jwt": "^0.1.23",
  "angular2-mdl": "1.7.1",
  "core-js": "^2.4.1",
  "es6-shim": "^0.35.0",
  "es7-reflect-metadata": "^1.6.0",
  "jwt-decode": "^2.0.1",
  "material-design-icons": "^3.0.1",
  "material-design-lite": "^1.2.1",
  "rxjs": "^5.0.0-beta.12",
  "zone.js": "^0.6.23"
     },
  
  "devDependencies": {
  "@angularclass/hmr": "^1.0.1",
  "@angularclass/hmr-loader": "^1.0.0",
  "angular2-template-loader": "^0.4.0",
  "css-loader": "^0.23.1",
  "exports-loader": "^0.6.3",
  "expose-loader": "^0.7.1",
  "extract-text-webpack-plugin": "^1.0.1",
  "favicons-webpack-plugin": "0.0.7",
  "file-loader": "^0.8.5",
  "html-loader": "^0.4.3",
  "html-webpack-plugin": "^2.15.0",
  "imports-loader": "^0.6.5",
  "jasmine-core": "^2.4.1",
  "json-loader": "^0.5.4",
  "karma": "^0.13.22",
  "karma-jasmine": "^0.3.8",
  "karma-phantomjs-launcher": "^1.0.0",
  "karma-sourcemap-loader": "^0.3.7",
  "karma-webpack": "^1.7.0",
  "null-loader": "^0.1.1",
  "phantomjs-prebuilt": "^2.1.7",
  "raw-loader": "^0.5.1",
  "sass-loader": "^4.0.0",
  "style-loader": "^0.13.1",
  "ts-loader": "^0.8.1",
  "tslint": "^3.5.0",
  "tslint-loader": "^2.1.3",
  "typedoc": "^0.4.4",
  "typescript": "^2.0.2",
  "typings": "^1.0.4",
  "webpack": "^1.13.2",
  "webpack-dashboard": "^0.1.8",
  "webpack-dev-server": "^1.15.1",
  "webpack-merge": "^0.14.1",
  "webpack-node-externals": "^1.4.3"
    }
  </code></pre>
  
  <p>My build and dev system is: "webpack": "1.13.2"</p>