title: GeoJson to TopoJson converter with Attributes
body: <p>I have GeoJson file converted from .shap file. each object has arc , points and some other property . Now When i tried to converter This GeoJson file to TopoJson file with this online app  <a href="http://shancarter.github.io/distillery/" rel="nofollow">http://shancarter.github.io/distillery/</a>  the converted TopoJson is Working Greate with D3.js But the object has only type: Polygon and arc attributes. all other attributes like id , GEOFIP etc are gone. I need these not all but at-least 2-3 attributes must need to add some more functionality to map in D3.js  </p>