Patch to add secure PDFs, and disable printing, if desired.

Hello!

I recently extended your module for a client's site, to use secure PDFs. They required that people not be able to download or print the PDFs, so I extended this module to include that functionality.

Along the way, I ran into a problem with multiple items per scribdfield, and created a workaround in the form of a callback function as well as documenting how to use the module in a readme.

I've spent some time tidying things up, testing, and creating an administrative interface, so I hope that these modifications will prove useful to someone.

To use this patch, navigate to the directory above the scribfield module, and run
patch -p0 < scribdfield-add-secure-pdfs.patch