Prerelease for 0.7.0

• Upgraded ASM versioning to 2014-06-01
• Added the ability to use personal vm images not just gallery images
• Namespaced all of the things so there is no leakage
• Added proper support for .pfx
• Added bin to transform .publishsettings files to .pfx files
• Added support for Azure.config.management_certificate as string
• Added ms-blob-content-disposition support, bump blob x-ms-version header to 2013-08-15
• Fixed KeepAlive and timeout for blobs
• VM sizes are available -- we just warn if they are not in our list
• Support for nokogiri on windows
• Ability to delete a staging deployment of a cloud service
• Peek_lock fixed for service bus
• Support for creating shared access signatures