title: md-button inside ui-gmap-window (angular-google-maps) error
body: <p><br>
  The Chrome console is throwing this error when I use a md-button in the html inside a google maps infowindow. </p>
  
  <pre><code>Error: [ngTransclude:orphan] http://errors.angularjs.org/1.3.2/ngTransclude/orphan?p0=%3Cbuttonlass%3D%22md-primary%20md-button%20md-default-theme%22%20ng-transclude%3D%22%22%20ng-click%3D%22button1callback()%22%20tabindex%3D%220%22%3E
  at Error (native)
  at https://code.angularjs.org/1.3.2/angular.min.js:6:416
  at Ja.link (https://code.angularjs.org/1.3.2/angular.min.js:237:351)
  at $ (https://code.angularjs.org/1.3.2/angular.min.js:70:46)
  at I (https://code.angularjs.org/1.3.2/angular.min.js:59:251)
  at g (https://code.angularjs.org/1.3.2/angular.min.js:51:299)
  at g (https://code.angularjs.org/1.3.2/angular.min.js:51:316)
  at https://code.angularjs.org/1.3.2/angular.min.js:50:414
  at WindowChildModel.angular.module.service.buildContent (http://rawgit.com/angular-ui/angular-google-maps/master/dist/angular-google-maps.js:863:63)
  at WindowChildModel.angular.module.service.createWindowOptions (http://rawgit.com/angular-ui/angular-google-maps/master/dist/angular-google-maps.js:831:29)angular.js:11383 (anonymous function)angular.js:8459 $getangular.js:8127 $angular.js:7637 Iangular.js:6993 gangular.js:6996 gangular.js:6872 (anonymous function)angular-google-maps.js:863 angular.module.service.buildContentangular-google-maps.js:831 angular.module.service.createWindowOptionsangular-google-maps.js:3355 angular.module.factory.WindowChildModel.createGWinangular-google-maps.js:3240 __bindangular-google-maps.js:3285 WindowChildModelangular-google-maps.js:6930 angular.module.factory.Window.initangular-google-maps.js:6915 (anonymous function)angular.js:12984 (anonymous function)angular.js:14200 $get.k.$evalangular.js:14016 $get.k.$digestangular.js:14238 (anonymous function)angular.js:4842 eangular.js:5215 (anonymous function)
  </code></pre>
  
  <p>I'm using the angular-google-maps <a href="http://angular-ui.github.io/angular-google-maps/#!/" rel="nofollow">http://angular-ui.github.io/angular-google-maps/#!/</a> library to use google maps with angular. In this plunker you can reproduce the error <a href="http://embed.plnkr.co/fWlFjuyuldZj6uITvWH7/preview" rel="nofollow">http://embed.plnkr.co/fWlFjuyuldZj6uITvWH7/preview</a>
  <br>Do you have any idea how to fix this?
  When I use a native html button it works well, but I need to use angular material. </p>
  
  <p>Thanks.</p>