Preparing for 5.0.19
Update contributors list
Remove split.recipe from dev edition

Left over from ginsu
Use spaces in dev tiddler filenames instead of %20
Clean up images for /dev

We’ve now got a couple of duplicates which will be sorted out later
Add note clarifying purpose of TiddlySpot settings

We’ve had a couple of cases where users have assumed that the “backup”
setting applies to ordinary, local saves