Balance sheet column headings should be the column's end date:

Balance Sheet 2020-07-03

                                      ||                                   2020-07-03
======================================++==============================================

But in the HTML output, it seems to be a date range instead:

In gfm-mode, it'd be rad if strings like looks good to me :+1: fontified the :+1: somehow to make it stand out.

Rename root directory

The root directory does not contain the correct name. It is supposed to be labeled /Audio/ NOT /Music/

I don't know if it is easy to do this, since over 540 commits have been made to this folder as of June 8th 2020.