title: gradle directory in an Android Studio project
body: <p>There is a directory called <em>gradle</em> in my Android Studio project. <a href="https://github.com/github/gitignore/blob/master/Android.gitignore" rel="nofollow">They</a> don't say it should be excluded from version control. What is in this directory?</p>
  
  <p><strong>Update #1.</strong></p>
  
  <p><a href="https://code.google.com/p/android/issues/detail?id=60045" rel="nofollow">Android Studio bug.</a> It updates gradle/wrapper/gradle-wrapper.properties every time I run it.</p>