Image filename includes special characters

[jeffpaul]

I can't seem to find where https://github.com/10up/windows-azure-storage/blob/master/images/Azure%202017.png is utilized within the codebase or on .org (https://wordpress.org/plugins/windows-azure-storage), but that space in the filename may eventually cause problems if that images gets used somewhere/somehow. I'd recommend we check to see if its needed and if not then remove from the repo, but if its needed we should consider renaming the file to eliminate special characters.