I've updated the instructions to grab origami from

https://github.com/gdelugre/origami

I'm going to add in pdf2pdfa in the workflow. I'll tack this on after ghost script reconstructs the file.

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pdf2pdfa [<PDF-file>] [-o <output-file>]
Enforces a document to be rendered as PDF/A.
This will disable multimedia features and JavaScript execution in Adobe Reader.
Bug reports or feature requests at: http://github.com/gdelugre/origami

Options:
-o, --output FILE Output PDF file (stdout by default)
-h, --help Show this message
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