Need up-to-date Windows install guide

[jenesaisdiq]

The name says it all. We need to have an official, fully functional, easy to follow, simple as possible guide for getting the CLI up on Windows.

[kennethlimcp]

@jenesaisdiq, not sure if this helps: https://community.spark.io/t/tutorial-spark-cli-on-windows-25-feb-2015/3112

Not official but i think the majority follow this tutorial i wrote