PdfAlto

[lfoppiano]

I was wondering if you could add pdfalto in the benchmark: https://github.com/kermitt2/pdfalto

[lfoppiano]

Hi all,
I've added pdfalto in my fork: https://github.com/lfoppiano/pdf-extraction-benchmarks

I also removed the post-processing which was fixing ligatures and removing footers, because the plain text extraction should aim to extract all the text without any structure.