Add eos-vm benchmarks

[hugo-dc]

[axic]

eosvm doesn't seem to show up in the charts?

[hugo-dc]

I have rebased master, and included eos-vm in the notebook so the charts get generated.

[axic]

Can you add eosvm to the README?

[hugo-dc]

I already modified the script https://github.com/ewasm/benchmarking/pull/150/files#diff-a6dee7477faf26016717d019cdc8bf1b , althought I modify it manually, do you want me to use the nbconvert tool instead?

[hugo-dc]

Now I converted the notebook to a script, and included the charts generated by the script.