GoogleChromeLabs Audioworklet Polyfill Versions Save

• Fixes #12.

• Detect and use Safari's prefixed webkitAudioContext (#11, thanks @warpdesign!)
• Fix AudioWokrletNode.port being assigned incorrectly in 1.1.0 (#10, thanks also to @warpdesign)

• Automatically choose buffer size (#3, thanks @Korilakkuma!)
• Fix currentTime and sampleRate implied globals always being 0 (did not affect property access via AudioWorkletGlobalScope) (#7)
• Bring MessagePort behavior in line with spec: AudioWorkletProcessor.port is now properly per-instance, and AudioWorkletGlobalScope no longer includes the MessagePort interface. (#8)
• Fix .connect() throwing in Firefox and Safari (#6)

Big thanks to @JohnWeisz for finding these issues and making some helpful suggestions.

Initial Release!