'Organising our small business' is now 'Working with Johnny.Decimal'

Preferring fewer, broader playlists (it's easier to manage), we renamed JDU's 'Organising our Small Business' to 'Working with Johnny.Decimal'. This aligns it with YouTube.

The JDU playlist will contain videos that YouTube doesn't – for example, today's 'How I keep my JDex entries and notes'. The JDU-only episodes will typically be less polished – this playlist will be a place I can throw up quick ideas, responses to your questions, that sort of thing.