renamed Isar/isar_output.ML to Thy/thy_output.ML;
tuned messages;
Antiquote.scan_arguments (moved from here);
moved ML context stuff to from Context to ML_Context;
\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|)}