adding readme

Author: pappleby64

Usage/README.md

@@ -0,0 +1,10 @@
+# Azure Stack Usage 
+
+```powershell
+Install-Module -Name AzureRM -RequiredVersion 1.2.8 -Scope CurrentUser
+Install-Module -Name AzureStack -RequiredVersion 1.2.8 -Scope CurrentUser
+```
+```
+Use this script to extract usage data from the AzureStack Usage API's and export it to a CSV file
+For more information on Billing and Usage see [here](https://docs.microsoft.com/en-us/azure/azure-stack/azure-stack-billing-and-chargeback)
+```