(core) Depend on D3 and TopoJSON

Author: Brandon Tilley

package.json

@@ -27,5 +27,9 @@
     "bower": "~1.2.8",
     "gulp-jshint": "~1.3.1",
     "gulp-replace": "~0.2.0"
+  },
+  "dependencies": {
+    "topojson": "~1.4.5",
+    "d3": "~3.3.13"
   }
 }