Updated download section
Updated download section

The process of adding the 8+ version to an android project wasn't clear to me so I made clear where to put which part.
JakeWharton/butterknife,JakeWharton/butterknife,hzsweers/butterknife,ChristianBecker/butterknife,qingsong-xu/butterknife,ze-pequeno/butterknife,hzsweers/butterknife,ze-pequeno/butterknife,qingsong-xu/butterknife,JakeWharton/butterknife,ChristianBecker/butterknife,ze-pequeno/butterknife,ChristianBecker/butterknife,ChristianBecker/butterknife,JakeWharton/butterknife,ze-pequeno/butterknife,hzsweers/butterknife,qingsong-xu/butterknife