Updated output content and structure.
Refactored processing.
Refactored PHP.
Refactored more PHP.
Updated data (both input and output).
Revert "Updated data (both input and output)."

This reverts commit 32bd00f0014b3da5b16e86f47ffa3eb01f3b1280.
Refactored configuration.
Refactored JS.
Added styling for graph captions.
Added Last.fm functionality for retrieving album thumbnails.