Copy readme from https://github.com/msysgit/msysgit
I copied this in case they change it or the package goes away. This document describes the componentes of msysgit, which is part of git bash for windows. It explains the difference between MSys and MinGW, and has a link to a very useful wiki (https://github.com/msysgit/msysgit/wiki) with instructions on how to report bugs etc.