moved theorem tags from Drule to PureThy;
replaced kind attribute by kind string;
tuned name_multi: index > 1 only;
added note_thmss_qualified (from Isar/locale.ML);
%FIXME
%\chapter{Basic Concepts}\label{ch:basics}
%\section{The Isar proof language}
%%% Local Variables:
%%% mode: latex
%%% TeX-master: "isar-ref"
%%% End: