doc-src/TutorialI/readers

setup: theory -> theory;
Syntax.appl(C)_syntax;

By chapter:

chapters 1 and 2, maybe 3: Peter White
chapters 6, 7 and 8: David von Oheim
chapter 6, maybe 8: Gerwin Klein
chapters 3, maybe 4: Tanja Vos
chapters 1-3 at least: Stefano Bistarelli