title: How to run TopoJSON?
body: <p>I need to convert a geojson file to topojson and possibly simplify the topojson file. I've managed to install Node.js and the topojson package. But I have no idea how to run topojson. </p>
  
  <p>The wiki lists a bunch of command line options, but where do I run those commands? I've tried running them both in the command prompt and the node shell. Node, GDAL, ogr2ogr and TopoJSON are all new concepts for me, so I'm a bit confused and overwhelmed.</p>
  
  <p>I'm running on Windows by the way.</p>