Azure IoT Hub client SDK portable libraries are available on NuGet

We have a [PCL package](https://www.nuget.org/packages/Microsoft.Azure.Devices.Client.PCL) available on NuGet.org. The PCL library supports Android, iOS, Windows 10 (UWP) and Windows Phone (WinRT). Android and iOS support was made possible thanks to Xamarin. This initial release enables the client to run over HTTP. * Azure IoT Hub * Features * SDK and Tools * [ Azure IoT Hub](https://azure.microsoft.com/en-gb/products/iot-hub/)