documentation & examples: links to github 404

[MS44118]

found some broken links in http://uber.github.io/react-vis/

for exemple, docs/examples/responsive-vis.md links to

• Scatterplot source code
• Barchart source code

files are not anymore in this directory:
https://github.com/uber/react-vis/blob/master/

but in this one:
https://github.com/uber/react-vis/blob/master/packages/

[karansinghgit]

A lot of the links are broken throughout the documentation.

[reitlepax]

Thank you for signaling it, I am going to look into it.

[Xiot]

We still need to publish the new documentation.
We'll close this again when we do.

[chrisirhc]

Fixed via #1342