readme tweak re scala 2.11.5
readme tweak re scala 2.11.5

pfn/android-sdk-plugin,wpc009/android-sdk-plugin,pfn/android-sdk-plugin,dant3/android-sdk-plugin,aafa/android-sdk-plugin,aafa/android-sdk-plugin,wpc009/android-sdk-plugin,dant3/android-sdk-plugin,pfn/android-sdk-plugin,adsinc/android-sdk-plugin,zbsz/android-sdk-plugin,zbsz/android-sdk-plugin,adsinc/android-sdk-plugin,aafa/android-sdk-plugin