Allow using Storybook for local development.

[Xiot]

Storybook is an easy to use UI to enable testing out features. This allows storybook to pick up changes from react-vis/src so that it can be used while developing components.

[Xiot]

I realize that its baking in some of the external config, but it only does it for development.

Previously, the storybook, used react-vis from the node_modules, so if you wanted to make a change and see it in storybook, you had to

1. make the change
2. stop storybook
3. yarn build on react-vis
4. start up the storybook.

With this, the development cycle becomes.

1. start storybook
2. make a change to the component.
3. repeat step 2.

This greatly enhances the flow.

I really like developing with storybook because of the ability to add knobs. You end up with a fairly fluid experience.

When I was digging into https://github.com/uber/react-vis/issues/1347 I actually set up a storybook as it allowed me to easily visualize and test what was going on. Unfortunately I had to follow the painful original flow of stopping, changing, building, starting

[CLAassistant]

Thank you for your submission! We really appreciate it. Like many open source projects, we ask that you sign our Contributor License Agreement before we can accept your contribution.

---

Chris Thomas seems not to be a GitHub user. You need a GitHub account to be able to sign the CLA. If you have already a GitHub account, please add the email address used for this commit to your account.
_{You have signed the CLA already but the status is still pending? Let us recheck it.}