Support for reverse vending machines

[JackGilmore]

Add support for reverse vending machines

Wikidata example: https://www.wikidata.org/wiki/Q108865092
OpenStreetMap tag: https://wiki.openstreetmap.org/wiki/Tag:vending%3Dbottle_return

Tasks

• Plot Sainsburys Berryden recycle for points facility on OSM
• Rewrite Overpass query to include reverse vending machines
• Display appropriate marker on the map
  • Do we want to differentiate these from HWRCs somehow? (e.g. iconography with Leaflet.awesome-markers
• Display popup content with marker info (might need to create two templates; one for HWRCs and one for reverse vending machines)