Added entry for curses module.

Doc/lib/lib.tex

@@ -136,6 +136,7 @@ add new extensions to Python and how to embed it in other applications.
 \input{libcmpcache}
 \input{libtime}
 \input{libgetpass}
+\input{libcurses}
 \input{libgetopt}
 \input{libtempfile}
 \input{liberrno}