Uses https://github.com/guardianproject/NetCipher to limit our SSL cipher
suite to known secure implementations, avoiding issues that have been
reported via Rollbar of inability to access tiles due to clients
attempting to download them via SSLv3, which is insecure and not supported
by AWS CloudFront.
Also upgrades our Gradle version to 2.0, which is required for Android Studio 2.0+
Uses https://github.com/guardianproject/NetCipher to limit our SSL cipher suite to known secure implementations, avoiding issues that have been reported via Rollbar of inability to access tiles due to clients attempting to download them via SSLv3, which is insecure and not supported by AWS CloudFront.
Also upgrades our Gradle version to 2.0, which is required for Android Studio 2.0+
Connects to #259