Add ProGit source file

Copy https://github.com/progit/progit zh folder to src\chapters folder
and edit book.txt to add related files
Windows DOS cmd compatibility

change mkdir cmd to make it run in DOS
Merge branch 'Branch_22b75a2be123844e04c81ae5d06ea4d51db42778'
Revert "Add ProGit source file"

This reverts commit 4159ddfa7fbc561310f97b71969ed0779791aee1.
Merge branch 'Branch_22b75a2be123844e04c81ae5d06ea4d51db42778'