Script added to configure SP.COM credentials

A powershell script has been added so that a developer can configure the
SP.COM credentials via the commandline.
The README document has been updated to reflect the methods by which
these credentials may be configured for the application
Create License for Purchase Record

Licenseing Service added to allow creation of a license for a purchased
product using its SKU Id and the software potential credentials in the
config file
ActivationKey and LicenseId are associated with with the purchased
product in the purchase record