安装angular learnangular 的时候报错，而且window用git-bash也没法儿按上下左右键选择

Error --verson

You don’t seem to have a generator with the name “karma:app” installed.

But help is on the way:

You can see available generators via npm search yeoman-generator or via http://yeoman.io/generators/.

Install them with npm install generator-karma:app.