First tagged release

This is a fully functional release of cloud_enum. I actually recommend always pulling from master, but for inclusion in some repositories we need tagged releases.

This version supports the following:

Amazon Web Services:

• Open S3 Buckets
• Protected S3 Buckets

Microsoft Azure:

• Storage Accounts
• Open Blob Storage Containers
• Hosted Databases
• Virtual Machines
• Web Apps

Google Cloud Platform

• Open GCP Buckets
• Protected GCP Buckets
• Google App Engine sites