40C3: tours, schedule data, tour map and calendar entries

- tour-map shortcode: Leaflet map of the tour locations with routes from the
  Congress, from the map/tours sections of data/schedule/<event>.yaml; Leaflet
  and the OSMIC, Maki and Temaki icon sets vendored; 39C3 uMap data converted.
- calendar shortcode: per tour date, a pill with an .ics download (iCalendar)
  and a Google Calendar link; Font Awesome Free vendored, fa-icon partial.
- README sections for the calendar and tour map shortcodes and the map data.

assets/vendor/icons/temaki/lipstick.svg

@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<svg version="1.1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" x="0" y="0" viewBox="0 0 15 15">
+  <path d="M11 8C12 8.5 14 8.5 15 8C15 8 15 14 15 14C15 15 11 15 11 14C11 14 11 8 11 8zM11.5 4.5C11.5 4.5 11.5 7.5 11.5 7.5C11.5 8 14.5 8 14.5 7.5C14.5 7.5 14.5 4.5 14.5 4.5C14 5 12 5 11.5 4.5zM12 2C12 2 12 4 12 4C12 4.5 14 4.5 14 4C14 4 14 0.5 14 0.5C14 0.5 12 1.5 12 2z"/>
+  <path d="M7 5C8.5 5 8.5 7 10 7C10 7 8 10 5 10C2 10 0 7 0 7C1.5 7 1.5 5 3 5C4 5 5 6 5 6C5 6 6 5 7 5zM8 7C6.5 7.5 3.5 7.5 2 7C4.5 8.5 5.5 8.5 8 7z"/>
+</svg>