-keep class null {
    <init>();
    void attachBaseContext(android.content.Context);
}
-keep class com.zepchat.app.MainActivity { <init>(); }
-keep class com.zepchat.app.MessagingActivity { <init>(); }
-keep public class * extends android.app.backup.BackupAgent {
    <init>();
}
-keep public class * extends java.lang.annotation.Annotation {
    *;
}