Module not found Error with react-sketch as dependency
Hi, I'm using ``react-sketch`` as a dependency in my JS project (thanks for a really cool tool :-)). I tried updating to version 0.5.1, and now webpack crashes with the following error.
```
ERROR in ./node_modules/react-sketch/dist/index.js
Module not found: Error: Can't resolve 'jsdom' in '/home/emma/sandbox/dash-canvas/node_modules/react-sketch/dist'
 @ ./node_modules/react-sketch/dist/index.js 1:85-101
 @ ./src/lib/components/DashCanvas.react.js
 @ ./src/lib/index.js
```

If I add ``jsdom`` to the list of devdependencies in the package.json file, then there a lots of new "Module not found" error (for 'tls', 'fs', 'net'...). 

I didn't have the problem with version 0.4.4.

Any ideas about what's going on? I'm not a Javascript expert, so any help will be very welcome...