Provide more information\instructions on readme\wiki.

[SteloNLD]

This Ansible role is promising but not a lot of information is provided at the moment, it took me trough some trouble to get everything to work.

Please provide some more information about the following:

• How to install the ansible-powershell role.
• How to use the ansible-powershell role with detailed steps.

[SteloNLD]

I used the following method to install this role.

1. Create a reqruiments.yml file and add the following content

---
- name: ansible-powershell
  src: https://github.com/ngetchell/ansible-powershell.git

2. Run the following command to install the role: ansible-galaxy install -r ./reqruiments.yml