Update README.rst
Update README.rst

Fix a typo and images
gareth8118/spreads,adongy/spreads,DIYBookScanner/spreads,nafraf/spreads,gareth8118/spreads,DIYBookScanner/spreads,miloh/spreads,adongy/spreads,nafraf/spreads,gareth8118/spreads,adongy/spreads,nafraf/spreads,miloh/spreads,DIYBookScanner/spreads,miloh/spreads