Actions
Currently available actions are:
- render-html: Render an HTML and CSS document to PDF, via Flying Saucer.
 - render-legacy-html: Render a legacy HTML and CSS document to PDF, via Apache FOP.
 - concatenate: Concatenate two or more PDFs together.
 - thumbnails: Generate page thumbnails for a PDF.
 - split: Split the page ranges of a PDF into new documents.
 - metadata: Retrieve PDF metadata.
 - crush: A best-effort attempt to reduce the size of the document at the cost of image quality.
 - stamp: Watermark / stamp a PDF with a PDF overlay.