Re-add ProGuard rules which prevent obfuscation.
Re-add ProGuard rules which prevent obfuscation.

serj-lotutovici/butterknife,JakeWharton/butterknife,ze-pequeno/butterknife,JakeWharton/butterknife,hzsweers/butterknife,serj-lotutovici/butterknife,qingsong-xu/butterknife,qingsong-xu/butterknife,hzsweers/butterknife,ze-pequeno/butterknife,ChristianBecker/butterknife,oguzbabaoglu/butterfork,ChristianBecker/butterknife,oguzbabaoglu/butterfork,qingsong-xu/butterknife,ChristianBecker/butterknife,serj-lotutovici/butterknife,ze-pequeno/butterknife,ChristianBecker/butterknife,hzsweers/butterknife,JakeWharton/butterknife,oguzbabaoglu/butterfork,ze-pequeno/butterknife,JakeWharton/butterknife