markmfredrickson/optmatchExperimental

pdf compaction

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While running make check, getting the following:

* checking sizes of PDF files under ‘inst/doc’ ... WARNING
  ‘gs+qpdf’ made some significant size reductions:
     compacted ‘mlm-vignette.pdf’ from 353Kb to 67Kb
  consider running tools::compactPDF(gs_quality = "ebook") on these files

Non-blocking, but to address in the future before moving mlm & vignette into optmatch.. Not sure at present how to ensure the compaction happens each time the vignette is re-created (or if its just an issue with the Markdown).