Quickie D3-only slippy map of rivers.
Completely cargo-cult hacked from mbostock's OSM vector tile demo
Modified http://d3js.org/d3.v3.min.js to a secure url
Modified http://d3js.org/d3.geo.tile.v0.min.js to a secure url
https://d3js.org/d3.v3.min.js
https://d3js.org/d3.geo.tile.v0.min.js