Add support for Windows

[GantMan]

We need to help our Windows friends! Linux/Mac support looks great, but you never know on window. Let's check!

[murilodag]

Hello @GantMan,

Could you attach a demo file so I could check on Windows?

[GantMan]

Yup! So here's a good demo file we keep on hand:
https://github.com/infinitered/solidarity/blob/master/.solidarity.example

This is currently ensuring the environment for a React Native project, but I'm sure with a slight adjustment it could be modified to be for any project environment needs.

File needs to be renamed to .solidarity to be live.

[VerteDinde]

@GantMan I'm doing a lot of Windows testing in a VM as well; happy to be a second set of eyes and possibly help with any patches (though I don't want to step on your toes at all, @murilodag ) 😃

Will test this week and report back.

[murilodag]

@GantMan, don't worry. =)

[GantMan]

btw, I've added some getting started with contributing docs. Let me know if you have any questions.

[GantMan]

This was completed by @kevinvangelder