Azure SDK for Go v15 is available

[Version 15.0.0](https://github.com/Azure/azure-sdk-for-go/tree/v15.0.0) of the Azure SDK for Go has been [tagged](https://github.com/Azure/azure-sdk-for-go/releases/tag/v15.0.0) ([changelog](https://github.com/Azure/azure-sdk-for-go/blob/v15.0.0/CHANGELOG.md)). We’ve also published an [SDK update policy](https://github.com/Azure/azure-sdk-for-go/wiki/SDK-Update-Practices) to help you understand how our repo has been organised and when to expect updates. To start using this version: * If you use dep, update your Gopkg.toml file and run `dep ensure -update` * If you don’t use dep, run `go get -u github.com/Azure/azure-sdk-for-go` If you’re just getting started with Go on Azure, visit our [docs](https://docs.microsoft.com/go/azure/) and the [samples repo](https://github.com/Azure-Samples/azure-sdk-for-go-samples) for help. * Azure Resource Manager * SDK and Tools * [ Azure Resource Manager](https://azure.microsoft.com/en-gb/get-started/azure-portal/resource-manager/)