BoD/android-switch-backport — pull request #30 by ahaeber (2013-12-10 13:02:31+00:00)
Title: Improve proguard rule to keep Preference classes

Sorry, did not properly test the Proguard rule for keeping Preference:s. We need to ensure that Proguard does not strip away important members of the class as well, such as constructors. This rule change keeps all members of Preference classes. That's the safest way.