[Patch] Update religion presets and element styles

[Claudius]

This patch:

1. will add two icons to the standard element styling for places of worship for two religions that have ​more than 100 object occurances according to Taginfo already: tenrikyo and confucian
2. updates the denominations values to cover ​today's top 20 denominations according to taginfo.
3. replaces the religion value of unitarian with the established and variant documented in the ​OSM wiki about religion unitarian_universalist

The map icons originate from PD wikimedia symbols:
​https://commons.wikimedia.org/wiki/File:Tenrikyo_emblem.svg
​https://commons.wikimedia.org/wiki/File:%E6%9C%A8%E9%90%B8_---_Confucian_wooden-clapper_bell.svg

[Klumbumbus]

confucian.svg​ is invisible at black background in the mapview. Could you please adjust this? At wiki:/DevelopersGuide/DefaultPresets are some hints regarding new icons.

[Claudius]

Updated with white background pagecolor to ensure contrast with light/dark backgrounds. Goes into images/presets/religion

[Claudius]

Thanks for reviewing, Klumbumbus. I've updated both SVGs to ensure they stay visible against black background

[Klumbumbus]

It seems the icons are still the same. Did you accidentaly attach the old versions again?

[Claudius]

Now with white rectangular outline ensure contrast with light/dark backgrounds. Goes into images/presets/religion

[Don-vip]

confucian.svg looks empty.

[Klumbumbus]

In 14867/josm:

fix #17249 - clean up religion and denomination, replace religion=unitarian by religion=unitarian_universalist, warn about religion=catholic, add religion=tenrikyo and religion=confucian, add icons (​https://commons.wikimedia.org/wiki/File:Tenrikyo_emblem.svg and ​https://commons.wikimedia.org/wiki/File:%E6%9C%A8%E9%90%B8_---_Confucian_wooden-clapper_bell.svg, modified, PD and CC0 licensed)

[Klumbumbus]

https://josm.openstreetmap.de/browser/josm/trunk/images/presets/religion/confucian.svg?rev=14867&order=name is displayed only white in trac/firefox but correct in JOSM. todo: check tomorrow if it is still displayed in JOSM correctly after svg cleaner has done its job.

[Klumbumbus]

In 14873/josm:

see #17249 - fix confucian icon