audio player first pass

[webofpies]

First pass for audio player

There's a temporary "browse" button for adding an audio file to the player. This button won't be there for the final version probably.

What needs to be implemented on back end:

1. storing bookmark positions (from 1 to 99 probably) for later retrieving
2. storing last play position (from 1 to 99 probably) so user can resume immediately when reopening a book. Variable "lastPlayTime" is already declared and used in the script.

[jzohrab]

Super, thanks very much!

The PR touches a few lines of code it shouldn't, looks like your editor was auto-reformatting some files. In some cases those suggested changes are good. I'll try working with the commit in a feature branch.

[jzohrab]

Closing in favor of feature branch in PR #49 -- Lute itself needs some work to properly support this change.