* scribo/text/recognition.hh: Add comments.

	* src/debug/show_links_single_right.cc: Fix an invalid
	incrementation.

	* src/Makefile.am: Add Magickxx flags for pbm_text_in_doc.

	* src/binarization/sauvola_ms.cc,
	* src/text_in_doc_preprocess.cc,
	* src/text_in_picture_neg.cc,
	* src/text_recognition_in_picture.cc: Initialize LibMagick++.