* demo/viewer/Makefile.am: Add new files.

	* demo/viewer/config.cc,
	* demo/viewer/config.hh: Add OCR settings.

	* demo/viewer/toolchain_options.cc,
	* demo/viewer/toolchain_options.hh,
	* demo/viewer/toolchain_options.ui: Remove.

	* demo/viewer/ocr_options.cc,
	* demo/viewer/ocr_options.hh,
	* demo/viewer/ocr_options.ui,
	* demo/viewer/preprocessing_options.cc,
	* demo/viewer/preprocessing_options.hh,
	* demo/viewer/preprocessing_options.ui,
	* demo/viewer/segmentation_options.cc,
	* demo/viewer/segmentation_options.hh,
	* demo/viewer/segmentation_options.ui: New option widgets.

	* demo/viewer/preferences_dialog.cc: Insert new widgets.

	* demo/viewer/runner.cc: Take OCR settings into account.