Provide instructions for Git for Windows installations

[pstampernas]

Using Git for Windows doesn't include make. This makes it impossible to install git-issue in a Windows environment.

[pstampernas]

There is a workaround to this issue. It includes the use of make from ezwinports and extracting its contents in <Git_for_Windows_Installation_Path>\mingw64. This workaround is based on evanwill's gitBash_windows.md gist.

[pstampernas]

Also, JQ, needs to be added in the Windows installation instructions and how to use it in Git.

[dspinellis]

Wouldn't it be easier to use WSL or CygWin?

[pstampernas]

Sure. That would be easier. But for people that are already using Git for Windows, it would require of them to use CygWin or WSL. If someone doesn't want to use them, then instructions for that Git flavor is better. Also, I consider it the most usual way to use Git in Windows, and, probably, the most popular.
I just want to make the project more inclusive and, perhaps, more widespread.
Also, I could provide a commit with such instructions, since I already did it in my system.

[dspinellis]

I see your point. Yes, please supply a pull request with the requisite documentation changes.

[pstampernas]

I have forked the repository. As soon as I have the necessary changes ready, I will perform the pull request.
Sorry it takes so long, but I had issues with my Git configuration, that are now resolved.