a dependency list: working towards a simpler install process

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+You need, in your $PATH:
+ - unpaper
+ - ocropus (this drags along a horrible set of dependencies, sorry. A future project is extracting the tiny part scandal actually uses.)
+ - ImageMagick (in particular, the convert utility)
+ - pdf2dsc, part of ghostscript (which you'll also need to allow imagemagick to process pdfs)
+ - a standard saneish linux/bsd environment (both Linux and OS X work)
+ - (probably) bash - I haven't made or checked its compatible yet.