Made progress to next audio file work on IE9. Fixed various bugs.
Documentation of player commands.
Fixed issue that caused book index navigation to fail (partially).
Disable navigation buttons when the player is loading.
Better wording of playback related TODO.
Fixed bug that caused an error when navigating to the player window without specifying a book to load.
Fixed bug that caused all user-set bookmarks to get offset 0.
Removed deprecated guest page.

Moved bookshelf page back to bookshelf.html.
Indentation.
Removing MacOS metadata directories.
Removing unused icon.
Removed unused image.
Removed inline license (its all in the file "LICENSE").