scantailor: Add option to switch from content- to page-detection
scantailor: Add option to switch from content- to page-detection

nafraf/spreads,DIYBookScanner/spreads,nafraf/spreads,adongy/spreads,jbaiter/spreads,nafraf/spreads,miloh/spreads,gareth8118/spreads,miloh/spreads,DIYBookScanner/spreads,DIYBookScanner/spreads,jbaiter/spreads,gareth8118/spreads,gareth8118/spreads,miloh/spreads,adongy/spreads,jbaiter/spreads,adongy/spreads