February update for Azure IoT Edge

The February update for Azure IoT Edge includes improvements to the runtime: * Python: Azure IoT Edge modules can now be written in Python through the [client](https://pypi.python.org/pypi/azure-iothub-device-client/1.3.0.0b0) and [service](https://pypi.python.org/pypi/azure-iothub-service-client/1.3.0.0b0) SDKs. * Edge CLI: The [Azure IoT extension](https://github.com/Azure/azure-iot-cli-extension/blob/master/README.md) for [Azure CLI](https://docs.microsoft.com/en-us/cli/azure/iot?view=azure-cli-latest) now allows programmatic management of IoT Edge solutions in addition to the existing Azure portal experience. * Protocol choice: Users can now configure the runtime to use AMQP or AMQP over WebSockets for communication with Azure IoT Hub. * Bug fixes: Multiple issues have been resolved, including fixes for the "could not find file 'C:\\app\\backup.json' exception" error and the bug that caused edge devices to appear as disconnected in the Azure portal. The [Azure IoT Edge extension](https://marketplace.visualstudio.com/items?itemName=vsciot-vscode.azure-iot-edge) for VS Code has been updated to: * Create, update, and delete IoT Edge devices and modules. * View module twins. The following articles have been published: * How to [use the Azure IoT extension](https://docs.microsoft.com/en-us/azure/iot-edge/tutorial-create-deployment-with-cli-iot-extension) * How to [debug C# modules](https://docs.microsoft.com/en-us/azure/iot-edge/how-to-vscode-debug-csharp-module) * How to [debug Azure functions](https://docs.microsoft.com/en-us/azure/iot-edge/how-to-vscode-debug-azure-function) that run on the edge * How to [use SQL Server](https://docs.microsoft.com/en-us/azure/iot-edge/sql-storage) on the edge [Code](https://github.com/Azure/iot-edge/tree/master/v2/samples) for the temperature sensor module used in the [quickstarts](https://docs.microsoft.com/en-us/azure/iot-edge/quickstart-linux) and [tutorials](https://docs.microsoft.com/en-us/azure/iot-edge/tutorial-simulate-device-linux) is now on GitHub. * Internet of Things * Features * [ Internet of Things](https://azure.microsoft.com/en-gb/products/iot-hub/)