title: Gradle keep on asking update and downgrade?
body: <p>I keep on getting "Gradle Sync error" so i checked had version 1.8. updated to 1.10, then it said i need 1.9, so i downgraded to 1.9 it said i need 1.8, when i downgrade to 1.8 it says i need 1.9. </p>
  
  <pre><code>15:28:09 Failed to refresh Gradle project 'Calendar'
           You are using Gradle version 1.8, which is not supported. Please use version 1.9.
           Please point to a supported Gradle version in the project's Gradle settings or in the project's Gradle wrapper (if applicable.)
           Fix Gradle wrapper and re-import project Gradle settings
  15:28:26 Failed to refresh Gradle project 'Calendar'
           You are using Gradle version 1.10, which is not supported. Please use version 1.9.
           Please point to a supported Gradle version in the project's Gradle settings or in the project's Gradle wrapper (if applicable.)
           Fix Gradle wrapper and re-import project Gradle settings
  15:28:39 Failed to refresh Gradle project 'Calendar'
           Gradle version 1.8 is required. Current version is 1.9. If using the gradle wrapper, try editing the distributionUrl in
  C:\ProgramData\Microsoft\Windows\Start Menu\Programs\Android
  Studio\gradle\wrapper\gradle-wrapper.properties to gradle-1.8-all.zip.
           Please fix the project's Gradle settings.
  </code></pre>