WhisperSystems/TextSecure — pull request #2060 by devurandom (2014-11-02 14:18:54+00:00)
Title: The Google Repository is needed to build TextSecure

If the Google Repository is not installed, Gradle will complain that com.google.android.gms:play-services:6.1.71 is missing. Installing Google Play Services (counter intuitively) does not solve the issue. Solution found via: http://stackoverflow.com/a/25313527/1975217