Add rubygem-azure_mgmt_storage 0.19.1

Microsoft Azure Storage Management Client Library for Ruby.

This project provides a Ruby gem for easy access to the Azure ARM Storage API.
With this gem you can create/update/list/delete storage accounts.

WWW: https://github.com/Azure/azure-sdk-for-ruby
WWW: https://github.com/Azure/azure-sdk-for-ruby/tree/master/management/azure_mgmt_storage