SKIN.JSON FIELDS
================
format     Fixed: myjukebox-community-skin-v1
name       2-50 characters
subtitle   0-80 characters
version    Semantic version such as 1.0.0
baseLook   light or dark
dark       true or false
colors     Fixed #RRGGBB values only
assets     Fixed PNG paths or null for optional assets

No extra JSON fields are accepted. No code is executed from skin.json.
