Add react-dom dependency.

Author: robertwbradford

package.json

@@ -18,6 +18,7 @@
  "express": "^4.14.0",
  "immutable": "^3.8.1",
  "react": "^15.3.1",
+ "react-dom": "^15.4.1",
  "react-dom-stream": "^0.5.1",
  "react-redux": "^4.4.5",
  "react-router": "^2.7.0",