Added reference to Jeremy Dawson's paper on the word library.
Added header to remaining word/*.thy files so they show up in toc.
\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|)}