Missing plots for new benchmarks

[Ludovic Courtès]

Hello Neil,

There are no plots for the new benchmarks that were added recently
(‘structs.bm’ and ‘vlists.bm’).  Could you add them?

Optionally, could you add the benchmark title to the HTML code itself so
that they can be searched from the browser?

It’s really pleasant to have all these plots, especially to notice that
most of them have been going down lately.  :-)

Thank you!

Ludo’.