Upgrade to newest build tools and android plugin. Use provided scope.

This could as well solve VerifyErrors when already using a different version of support-v4. But not 100% sure since tests did not show that problem when I used the .aar file directly.

If still experiencing the VerifyErrors then one can use the following workaround:

    androidTestCompile ('com.squareup:fest-android:1.0.+') {
        exclude group: 'com.android.support', module: 'support-v4'
    }
Just copy this file into `gradle/` and apply it from a file. Depending on something in a random repo is bad news.