Update Makefile

Temporarily remove -W sphinxbuild flag (line 114) to have all languages build for now.

Makefile

@@ -111,7 +111,7 @@ html: localizeresources output/html/version.txt
 	$(SPHINXINTL) build -l $(LANG) -c $(SOURCEDIR)/conf.py
 	#  -n   Run in nit-picky mode. Currently, this generates warnings for all missing references.
 	#  -W   Turn warnings into errors. This means that the build stops at the first warning and sphinx-build exits with exit status 1.
-	$(SPHINXBUILD) -nW -b html $(ALLSPHINXOPTS) $(BUILDDIR)
+	$(SPHINXBUILD) -n -b html $(ALLSPHINXOPTS) $(BUILDDIR)
 	@echo
 	@echo "Build finished. The HTML pages for '$(LANG)' are in $(BUILDDIR)."