removed obsolete theorems;
handle generic XML markup as well (plain <markup> instead of <... class=markup>);
misc tuning/update according to Pure/Generic/markup.ML;
\index{model checking example|(}%
\index{lfp@{\texttt{lfp}}!applications of|see{CTL}}
\input{CTL/document/Base.tex}
\input{CTL/document/PDL.tex}
\input{CTL/document/CTL.tex}
\index{model checking example|)}