Refactored + added Windows support

[domx4q]

Hello,

I found this repo today and I liked it, but for me as a windows user, I couldn't use it. This is the reason for my refactoring.

I did not change much, I've mostly reordered the existing code and added some alternative commands for windows user. I think the script should still work on a linux system but this should be tested because I was not able to.

I hope this might help some people and maybe get merged.