title: Failed to Sync Gradle, could not find com.android.support:support-annotations:23.3.0
body: <p>Installing Butter Knife dependencies generates this error</p>
  
  <pre><code>Error:Could not find com.android.support:support-annotations:23.3.0.
  Required by:
      Butter:app:unspecified
      Butter:app:unspecified &gt; com.jakewharton:butterknife:8.0.1
      Butter:app:unspecified &gt; com.jakewharton:butterknife-compiler:8.0.1 &gt; com.jakewharton:butterknife-annotations:8.0.1
  
  Please install the Android Support Repository from the Android SDK Manager.
  &lt;a href="openAndroidSdkManager"&gt;Open Android SDK Manager&lt;/a&gt;
  </code></pre>
  
  <p>I have installed support library but it still I get this error. Here is how Gradle dependencies look like </p>
  
  <pre><code>dependencies {
      compile fileTree(dir: 'libs', include: ['*.jar'])
      testCompile 'junit:junit:4.12'
      compile 'com.android.support:appcompat-v7:23.2.1'
      compile 'com.android.support:support-annotations:23.3.0'
      compile 'com.jakewharton:butterknife:8.0.1'
      apt 'com.jakewharton:butterknife-compiler:8.0.1'
  
  }
  </code></pre>
  
  <p>I have also added plugin <code>apply plugin: 'com.neenbedankt.android-apt'</code> and repositories   </p>
  
  <pre><code>jcenter()
          mavenCentral()
          maven{
              url 'https://oss.sonatype.org/content/repositories/snapshots/'
          }
  </code></pre>
  
  <p><a href="https://i.stack.imgur.com/5oPms.png" rel="noreferrer"><img src="https://i.stack.imgur.com/5oPms.png" alt="Screenshot"></a></p>