Gradle Plugin User Guide - Android Studio Project Site
http://tools.android.com/tech-docs/new-build-system/user-guide
android studio gradle plugin 用户指南 选择性翻译
http://www.cnblogs.com/zhangfp/p/4063629.html
Gradle 官网
https://gradle.org/
https://plugins.gradle.org/
最新gradle-2.14.1下载（需要翻墙）
https://downloads.gradle.org/distributions/gradle-2.14.1-all.zip