libqueue.tex: Documentation for the Queue.py module.

Makefile: Add dependency on libqueue.tex

lib.tex: Place the libqueue.tex documentation just after libthread.tex
since Queue depends on thread support in Python.
diff --git a/Doc/Makefile b/Doc/Makefile
index cbf2f2d..1410c12 100644
--- a/Doc/Makefile
+++ b/Doc/Makefile
@@ -113,7 +113,7 @@
     libbase64.tex libfnmatch.tex libquopri.tex libzlib.tex libsocksvr.tex \
     libmailbox.tex libcommands.tex libcmath.tex libni.tex libgzip.tex \
     libpprint.tex libcode.tex libmimify.tex libre.tex libmacic.tex \
-    libuserdict.tex libdis.tex libxmllib.tex
+    libuserdict.tex libdis.tex libxmllib.tex libqueue.tex
 
 # Library document
 lib.dvi: $(LIBFILES)