title: Cannot generate new project using yeoman generator Gradle+Kotlin
body: <p>I installed Android Studio on Mac using <code>brew install Caskroom/cask/android-studio</code></p>
  
  <p>Then, I run <code>yo gradle-kotlin</code>, and got the following error. What can I do to make my first Hello World work?</p>
  
  <p>Thank you</p>
  
  <pre><code>✔ /Volumes/Git/android/kotlin-hello-world 
  10:53 $ yo gradle-kotlin
  
       _-----_
      |       |    .--------------------------.
      |--(o)--|    |      Welcome to the      |
     `---------´   | incredible Gradle+Kotlin |
      ( _´U`_ )    |        generator!        |
      /___A___\    '--------------------------'
       |  ~  |     
     __'.___.'__   
   ´   `  |° ´ Y ` 
  
    Detecting installed Gradle version...
    Fetching latest Kotlin version from Maven Central...
  ✔ Fetched latest Kotlin version: 1.0.1-2
  ✔ Detected installed Gradle version: 2.12
  ? What's your project name? kotlin hello world
  ? What Gradle version would you like to use? 2.12
  ? What Kotlin version would you like to use? 1.0.1-2
  ? Do you want to use Kotlin Reflection? Yes
  ? Would you like to use IDEA Gradle plugin? Yes
  identical .gitignore
  identical src/main/kotlin/.gitkeep
  identical src/test/kotlin/.gitkeep
  identical build.gradle
  identical gradle.properties
  identical settings.gradle
    Executing 'gradle wrapper' command...
  
  ✔ Done executing 'gradle wrapper' command.
    Executing Gradle tasks: idea build
  internal/child_process.js:298
      throw errnoException(err, 'spawn');
      ^
  
  Error: spawn EACCES
    at exports._errnoException (util.js:856:11)
    at ChildProcess.spawn (internal/child_process.js:298:11)
    at Object.exports.spawn (child_process.js:362:9)
    at Function.spawn (/usr/local/lib/node_modules/generator-gradle-kotlin/node_modules/cross-spawn-async/index.js:13:18)
    at spawn (/usr/local/lib/node_modules/generator-gradle-kotlin/node_modules/cross-spawn/index.js:34:23)
    at GradleKotlinGenerator.spawnCommand (/usr/local/lib/node_modules/generator-gradle-kotlin/node_modules/yeoman-generator/lib/actions/spawn_command.js:20:10)
    at ChildProcess.&lt;anonymous&gt; (/usr/local/lib/node_modules/generator-gradle-kotlin/generators/app/gradle-kotlin.coffee:78:8)
    at emitTwo (events.js:100:13)
    at ChildProcess.emit (events.js:185:7)
    at Process.ChildProcess._handle.onexit (internal/child_process.js:200:12)
  </code></pre>