Fix some sphinx warnings (#9)

* Fix some deprecation warnings in Doc/conf.py
* Fix an rst error in Misc/NEWS
diff --git a/Doc/Makefile b/Doc/Makefile
index 91f937f..6e1c183 100644
--- a/Doc/Makefile
+++ b/Doc/Makefile
@@ -10,7 +10,7 @@
 SOURCES      =
 DISTVERSION  = $(shell $(PYTHON) tools/extensions/patchlevel.py)
 
-ALLSPHINXOPTS = -b $(BUILDER) -d build/doctrees -D latex_paper_size=$(PAPER) \
+ALLSPHINXOPTS = -b $(BUILDER) -d build/doctrees -D latex_elements.papersize=$(PAPER) \
                 $(SPHINXOPTS) . build/$(BUILDER) $(SOURCES)
 
 .PHONY: help build html htmlhelp latex text changes linkcheck \