Demo links broken #22

Whoops, it seems as if the demo links are broken again.
They redirect to TLD .com, while they appear to only work with .io.

For example:
https://anvaka.github.com/oflow/demo/raw/index.html →
https://anvaka.github.io/oflow/demo/raw/index.html

This is fixed in #21

Thanks for this repo by the way!