Git is a distributed version control system.
Git is free software distributed under the GPL

本次新增
Git tracks changes. of files
My stupid boss still prefers SVN.
Creating a new branch is quick AND simple

clone带有子模块的项目
子模块只有目录没有内容，需要执行：git submodule init ,git submodule update
或者在clone的时候加上--recursive(递归的方式克隆整个项目)csssssssssssss