D3 Force Directed Graph with Node Labels

Adapted from: https://bl.ocks.org/mbostock/4062045, https://bl.ocks.org/mbostock/raw/4062045/ and https://www.dashingd3js.com/svg-text-element with https://www.dashingd3js.com/adding-an-svg-element as an additional reference.

The same code changed to give named node labels from miserables.json is at https://github.com/bshambaugh/mod-d3test-force-directed-4062045 .