define some photo types; primarily profile photos and things, but there is room for others. Also move the "decoration" out of the mod_page.css and into fancy.css - mod_xxx.css should only specify element positions and basic layout, not "decoration". Once we get more positioning stuff moved into module and basic layout files, we can trim down the style.css a lot - as it will theoretically only have decoration. And if we use macro substitution (pcss) we should be able to ultimately change the colour, size or background in one place and be done with it. This will make life easier for theme developers.
provide a controlling user for theme settings, not necessarily local_user() - can't test on my test site so moving into production and I'll debug it there.
configurable theme precedence rules, and passing the page owner to the pcss theme settings.
Merge https://github.com/friendica/red into zpull