Github issue #544, NPM Install error

-- Fixed. It was there because of latest update by react-datetime. They have updated the version (2.7.4) in package.json but forgot to make a release for the same.

Author: Vikas Agarwal

package.json

@@ -45,6 +45,7 @@
     "lodash": "^4.16.4",
     "moment": "^2.14.1",
     "react": "^15.3.1",
+    "react-datetime": "2.7.1",// To fix build issue github #544, hardcoding the version in other deps didn't work
     "react-addons-css-transition-group": "^15.3.1",
     "react-addons-pure-render-mixin": "^15.3.1",
     "react-color": "^2.2.7",