Documentation update.  Documentation will become the new Jinja2 website
diff --git a/docs/Makefile b/docs/Makefile
index 5e24ec1..52d78d9 100644
--- a/docs/Makefile
+++ b/docs/Makefile
@@ -5,71 +5,114 @@
 SPHINXOPTS    =
 SPHINXBUILD   = sphinx-build
 PAPER         =
+BUILDDIR      = _build
 
 # Internal variables.
 PAPEROPT_a4     = -D latex_paper_size=a4
 PAPEROPT_letter = -D latex_paper_size=letter
-ALLSPHINXOPTS   = -d _build/doctrees $(PAPEROPT_$(PAPER)) $(SPHINXOPTS) .
+ALLSPHINXOPTS   = -d $(BUILDDIR)/doctrees $(PAPEROPT_$(PAPER)) $(SPHINXOPTS) .
 
-.PHONY: help clean html web pickle htmlhelp latex changes linkcheck
+.PHONY: help clean html dirhtml singlehtml pickle json htmlhelp qthelp epub latex changes linkcheck doctest
 
 help:
 	@echo "Please use \`make <target>' where <target> is one of"
-	@echo "  html      to make standalone HTML files"
-	@echo "  pickle    to make pickle files"
-	@echo "  json      to make JSON files"
-	@echo "  htmlhelp  to make HTML files and a HTML help project"
-	@echo "  latex     to make LaTeX files, you can set PAPER=a4 or PAPER=letter"
-	@echo "  changes   to make an overview over all changed/added/deprecated items"
-	@echo "  linkcheck to check all external links for integrity"
+	@echo "  html       to make standalone HTML files"
+	@echo "  dirhtml    to make HTML files named index.html in directories"
+	@echo "  singlehtml to make a single large HTML file"
+	@echo "  pickle     to make pickle files"
+	@echo "  json       to make JSON files"
+	@echo "  htmlhelp   to make HTML files and a HTML help project"
+	@echo "  qthelp     to make HTML files and a qthelp project"
+	@echo "  devhelp    to make HTML files and a Devhelp project"
+	@echo "  epub       to make an epub"
+	@echo "  latex      to make LaTeX files, you can set PAPER=a4 or PAPER=letter"
+	@echo "  latexpdf   to make LaTeX files and run them through pdflatex"
+	@echo "  changes    to make an overview of all changed/added/deprecated items"
+	@echo "  linkcheck  to check all external links for integrity"
+	@echo "  doctest    to run all doctests embedded in the documentation (if enabled)"
 
 clean:
-	-rm -rf _build/*
+	-rm -rf $(BUILDDIR)/*
 
 html:
-	mkdir -p _build/html _build/doctrees
-	$(SPHINXBUILD) -b html $(ALLSPHINXOPTS) _build/html
+	$(SPHINXBUILD) -b html $(ALLSPHINXOPTS) $(BUILDDIR)/html
 	@echo
-	@echo "Build finished. The HTML pages are in _build/html."
+	@echo "Build finished. The HTML pages are in $(BUILDDIR)/html."
+
+dirhtml:
+	$(SPHINXBUILD) -b dirhtml $(ALLSPHINXOPTS) $(BUILDDIR)/dirhtml
+	@echo
+	@echo "Build finished. The HTML pages are in $(BUILDDIR)/dirhtml."
+
+singlehtml:
+	$(SPHINXBUILD) -b singlehtml $(ALLSPHINXOPTS) $(BUILDDIR)/singlehtml
+	@echo
+	@echo "Build finished. The HTML page is in $(BUILDDIR)/singlehtml."
 
 pickle:
-	mkdir -p _build/pickle _build/doctrees
-	$(SPHINXBUILD) -b pickle $(ALLSPHINXOPTS) _build/pickle
+	$(SPHINXBUILD) -b pickle $(ALLSPHINXOPTS) $(BUILDDIR)/pickle
 	@echo
-	@echo "Build finished; now you can process the pickle files"
+	@echo "Build finished; now you can process the pickle files."
 
 json:
-	mkdir -p _build/json _build/doctrees
-	$(SPHINXBUILD) -b json $(ALLSPHINXOPTS) _build/json
+	$(SPHINXBUILD) -b json $(ALLSPHINXOPTS) $(BUILDDIR)/json
 	@echo
-	@echo "Build finished; now you can process the json files"
-
-web: pickle
+	@echo "Build finished; now you can process the JSON files."
 
 htmlhelp:
-	mkdir -p _build/htmlhelp _build/doctrees
-	$(SPHINXBUILD) -b htmlhelp $(ALLSPHINXOPTS) _build/htmlhelp
+	$(SPHINXBUILD) -b htmlhelp $(ALLSPHINXOPTS) $(BUILDDIR)/htmlhelp
 	@echo
 	@echo "Build finished; now you can run HTML Help Workshop with the" \
-	      ".hhp project file in _build/htmlhelp."
+	      ".hhp project file in $(BUILDDIR)/htmlhelp."
+
+qthelp:
+	$(SPHINXBUILD) -b qthelp $(ALLSPHINXOPTS) $(BUILDDIR)/qthelp
+	@echo
+	@echo "Build finished; now you can run "qcollectiongenerator" with the" \
+	      ".qhcp project file in $(BUILDDIR)/qthelp, like this:"
+	@echo "# qcollectiongenerator $(BUILDDIR)/qthelp/Flask.qhcp"
+	@echo "To view the help file:"
+	@echo "# assistant -collectionFile $(BUILDDIR)/qthelp/Flask.qhc"
+
+devhelp:
+	$(SPHINXBUILD) -b devhelp $(ALLSPHINXOPTS) _build/devhelp
+	@echo
+	@echo "Build finished."
+	@echo "To view the help file:"
+	@echo "# mkdir -p $$HOME/.local/share/devhelp/Flask"
+	@echo "# ln -s _build/devhelp $$HOME/.local/share/devhelp/Flask"
+	@echo "# devhelp"
+
+epub:
+	$(SPHINXBUILD) -b epub $(ALLSPHINXOPTS) $(BUILDDIR)/epub
+	@echo
+	@echo "Build finished. The epub file is in $(BUILDDIR)/epub."
 
 latex:
-	mkdir -p _build/latex _build/doctrees
-	$(SPHINXBUILD) -b latex $(ALLSPHINXOPTS) _build/latex
+	$(SPHINXBUILD) -b latex $(ALLSPHINXOPTS) $(BUILDDIR)/latex
 	@echo
-	@echo "Build finished; the LaTeX files are in _build/latex."
+	@echo "Build finished; the LaTeX files are in $(BUILDDIR)/latex."
 	@echo "Run \`make all-pdf' or \`make all-ps' in that directory to" \
 	      "run these through (pdf)latex."
 
+latexpdf: latex
+	$(SPHINXBUILD) -b latex $(ALLSPHINXOPTS) _build/latex
+	@echo "Running LaTeX files through pdflatex..."
+	make -C _build/latex all-pdf
+	@echo "pdflatex finished; the PDF files are in _build/latex."
+
 changes:
-	mkdir -p _build/changes _build/doctrees
-	$(SPHINXBUILD) -b changes $(ALLSPHINXOPTS) _build/changes
+	$(SPHINXBUILD) -b changes $(ALLSPHINXOPTS) $(BUILDDIR)/changes
 	@echo
-	@echo "The overview file is in _build/changes."
+	@echo "The overview file is in $(BUILDDIR)/changes."
 
 linkcheck:
-	mkdir -p _build/linkcheck _build/doctrees
-	$(SPHINXBUILD) -b linkcheck $(ALLSPHINXOPTS) _build/linkcheck
+	$(SPHINXBUILD) -b linkcheck $(ALLSPHINXOPTS) $(BUILDDIR)/linkcheck
 	@echo
 	@echo "Link check complete; look for any errors in the above output " \
-	      "or in _build/linkcheck/output.txt."
+	      "or in $(BUILDDIR)/linkcheck/output.txt."
+
+doctest:
+	$(SPHINXBUILD) -b doctest $(ALLSPHINXOPTS) $(BUILDDIR)/doctest
+	@echo "Testing of doctests in the sources finished, look at the " \
+	      "results in $(BUILDDIR)/doctest/output.txt."