New project for ASP.NET examples (C#)
Added 1.HPP examples
Added 2.API examples (HTTP Post)
Added 2.API examples (SOAP)
Added 3.Notifications example
Added 4.Modifications examples
Added 5.Recurring examples
Added 6.PaymentMethods example
Added 7.OpenInvoice example
Added 8.CustomFields example
Added 9.Payout examples
Updated README.md to include all examples
Merge pull request #1 from adyenpayments/development

New ASP.NET (C#) examples