v0.9.5 The encoding pipeline improvements continue

I finally refactored the encoding pipeline to make things more obvious and to improve a sense of what progress is happening. Instead of a big ol’ pile of encoding/building/cleanup stages, everything’s all just wrapped up in a nice little compact UI, and I also made the CD authoring pipeline asynchronous so that it could also give a proper progress indicator.

It’s a little thing but it makes usability so much nicer.