addlow the Röntgen icon set to be used for icons, closes #75

CHANGELOG.md

@@ -12,7 +12,9 @@
 
 * :warning: Rename field type `cycleway` to `directionalCombo` ([#79])
 * Introduce new `date` field type ([#76])
+* Allow the `Röntgen` icon set to be used for icons ([#75])
 
+[#75]: https://github.com/ideditor/schema-builder/issues/75
 [#76]: https://github.com/ideditor/schema-builder/issues/76
 [#79]: https://github.com/ideditor/schema-builder/issues/79
 

README.md

@@ -326,6 +326,7 @@ The name of a local SVG icon file. You can use icons from any of the following i
 * [Maki](https://labs.mapbox.com/maki-icons/) (`maki-`), map-specific icons from Mapbox
 * [Temaki](https://ideditor.github.io/temaki/docs/) (`temaki-`), an expansion pack for Maki
     * This is the best place to submit a PR if you want to create a preset icon!
+* [Röntgen](https://github.com/enzet/map-machine#r%C3%B6ntgen-icon-set) [icon set](https://wiki.openstreetmap.org/wiki/R%C3%B6ntgen), part of the Map Machine project
 * [Font Awesome](https://fontawesome.com/icons?d=gallery&m=free), thousands of general-purpose icons
     * There is a free and pro tier. You can use any icon from the free tier in the following styles:
         * [Solid](https://fontawesome.com/icons?d=gallery&s=solid&m=free) (`fas-`)