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:

If you accept the name suggestion from paperboy, it will happily overwrite any files that happen to have that name in the library folder. Luckily in this case it was overwriting another copy of the same paper but it would be nice to have overwrite safeguards.

Reproduction:

1. Create multiple copies of a pdf in Inbox folder
2. Move them to library with the same name
3. Watch duplicates vani

Bug report

I had a directory I created for my own purposes named /tmp/box (I've mounted an external drive there by occasion also named "box", hence the directory to mount it). Next I start unit tests for the box itself, only

The owner of this repository is a non-native English speaker.
There may be unnatural sentences.
Please correct the README page.