Move itertools module from the sandbox and into production.
diff --git a/Doc/lib/lib.tex b/Doc/lib/lib.tex
index d1fd943..750d3ac 100644
--- a/Doc/lib/lib.tex
+++ b/Doc/lib/lib.tex
@@ -125,6 +125,7 @@
 \input{libheapq}
 \input{libarray}
 \input{libsets}
+\input{libitertools}
 \input{libcfgparser}
 \input{libfileinput}
 \input{libxreadlines}