Demo URLs are a bit broken

This is so nice, and so useful.

I had a bit of trouble navigating, though.

At https://anvaka.github.io/graph-drawing-libraries (which redirects to https://anvaka.github.io/graph-drawing-libraries/#!/all) all the "demo" links are slightly broken. They are like https://anvaka.github.io/graph-drawing-libraries/#/library/anvaka_VivaGraphJS but that renders as the same page as !/all. The experience is I click "demo" and nothing happens. If I manually change the URL to be like https://anvaka.github.io/graph-drawing-libraries/#!/library/anvaka_VivaGraphJS then they work.

Similar if I get through to the demo pages, like https://anvaka.github.io/graph-drawing-libraries/performance/?lib=anvaka_VivaGraphJS&graph=ladder&n=10 and then click on "render different graph", the URL is https://anvaka.github.io/graph-drawing-libraries/#/library/anvaka_VivaGraphJS when again it should have the ! to work.

Same behavior in Chromium Version 80.0.3987.149 (Official Build) snap (64-bit) and Firefox 74.0 (64-bit) for Ubuntu.

Start at the demo links on the graph-drawing-libraries page and the "render different graph" navigation from the performance demo. Trace how those links construct the hash URL; done means both navigation paths include the ! form and open the selected library or graph instead of returning to the all page.

Written by the indexing model from the issue text.