我在这里有这个项目的构建脚本：
https://github.com/melix/gr8confagenda/blob/master/gr8confagenda/build.gradle
但是当我尝试运行该项目时，我收到了这个错误：
* What went wrong:
A problem occurred configuring project ':gr8confagenda'.
> Could not resolve all dependencies for configuration ':gr8confagenda:_debugCompile'.
> Could not find com.android.support:support-v4:19.1.0.
Required by:
gr8confagenda:gr8confagenda:unspecified
我犯了错误？