Skin:Timeless/pl

Skin based on Winter and an attempt to incorporate all the sensible things suggested on this 2015 Village pump discussion into a skin. Shh. Don't tell them. They thought I wasn't serious.

The general aim is to make a fully featured skin that emphasises both content and editing tools, with multiple view modes for showing everything, focusing only on content (winter), or switching to dark/night viewing. One day it will actually do this.

Configuration

 * (string, default 'cat.svg')
 * Set it as you would $wgLogo to an appropriate background image. Recommendation is an svg set to 500-750px wide: svg for HiDPI support; the size can really be whatever, but where that will result in a similar behind-content look as with the default cat.
 * For a background to potentially also work unmodified with other background-colour themes if and when they are later implemented, a transparent single-colour image is recommended, with 20-50% opacity black/white, where the alpha values of the b/w parts are likewise around 10-50/255, as this should allow it to work on most anything that isn't pure white/black.
 * Examples (which actually don't follow the above recommendation and thus probably won't work on dark backgrounds): File:Timeless backdrop (wiktionary).svg and File:Timeless backdrop (metawiki).svg