Setup CI

Author: Gonkers

README.md

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 # Scryfall API Client
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+[![Build status](https://gonkers.visualstudio.com/Scryfall-API-Client/_apis/build/status/Scryfall-API-Client%20Nuget)](https://gonkers.visualstudio.com/Scryfall-API-Client/_build/latest?definitionId=5)
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 ## Getting Started
 Until I can get better documentation, see the [samples project](https://github.com/Gonkers/Scryfall-API-Client/tree/master/samples/ScryfallApi.WebSample) for examples.