title: Gradle can not find plugin
body: <p>I'm trying to integrate TestFairy with my project. I use Android Studio 0.8.2 Beta.</p>
  
  <p>Official site: <a href="http://testfairy.com/" rel="nofollow">http://testfairy.com/</a></p>
  
  <p>There is an example how it works: <a href="https://github.com/testfairy/testfairy-gradle-plugin" rel="nofollow">https://github.com/testfairy/testfairy-gradle-plugin</a></p>
  
  <p>This is my <em>build.gradle</em>:</p>
  
  <pre><code>repositories {
      maven { url 'http://clinker.47deg.com/nexus/content/groups/public';; }
      maven { url 'https://www.testfairy.com/maven';; }
  }
  apply plugin: 'com.android.application'
  apply plugin: 'testfairy'
  android {
      compileSdkVersion 19
      buildToolsVersion '20.0.0'
      defaultConfig {
          minSdkVersion 14
          targetSdkVersion 19
          versionCode 1
          versionName '1.0'
      }
      buildTypes {
          release {
              runProguard false
              proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.txt'
          }
      }
      productFlavors {
      }
      testfairyConfig {
          apiKey "Here is my real api key"
      }
  }
  
  dependencies {
      compile fileTree(include: ['*.jar'], dir: 'libs')
      compile 'com.nostra13.universalimageloader:universal-image-loader:1.9.2'
      compile 'org.roboguice:roboguice:2.0'
      compile 'com.google.code.gson:gson:2.2.4'
      compile 'com.android.support:support-v4:19.+'
      compile 'com.google.android.gms:play-services:4.2.42'
      compile 'se.emilsjolander:stickylistheaders:2.3.0'
      classpath 'com.testfairy.plugins.gradle:testfairy:1.+'
  }
  </code></pre>
  
  <p>The error I get is:</p>
  
  <blockquote>
    <p>Error:(6, 0) Plugin with id 'testfairy' not found.</p>
  </blockquote>
  
  <p>Hot to fix it?</p>