tabulapdf/tabula — pull request #213 by jeremybmerrill (2014-11-15 00:31:57+00:00)
Title: alert (in alert() and ocnsole) if a PDF has no text elements (i.e. is a scan)

depends on https://github.com/tabulapdf/tabula-extractor/pull/89 and feature/backbone

we probably want a better warning than a JavaScript alert(), but it's a start towards #211