Adds the following features:

• Calls and returns value of getClientExtensionResults
• Verified compatibility with Windows Hello (esp. userHandle field)
• Fixes detection and event firing when WebAuthn is not supported by the browser
• Minor bug fixes

More useful information for debugging and exploring WebAuthn:

• debugInfo added to server response to see how the server interpreted the information
• toHumanString updated to be more detailed and automatically hex-dump ArrayBuffers
• Changed routes to the routes that will be used for certification

First release

• API complete and mostly tested
• Documentation complete, with some editorial work needed