Some cleanup in the docs.
diff --git a/Doc/Makefile b/Doc/Makefile
index ea62f00..04cca4e 100644
--- a/Doc/Makefile
+++ b/Doc/Makefile
@@ -16,10 +16,11 @@
 
 help:
 	@echo "Please use \`make <target>' where <target> is one of"
-	@echo "  html   to make standalone HTML files"
-	@echo "  web    to make file usable by Sphinx.web"
+	@echo "  html     to make standalone HTML files"
+	@echo "  web      to make file usable by Sphinx.web"
 	@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 "  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"
 
 checkout:
 	@if [ ! -d tools/sphinx ]; then \
@@ -66,6 +67,10 @@
 	@echo "Run \`make all-pdf' or \`make all-ps' in that directory to" \
 	      "run these through (pdf)latex."
 
+changes: BUILDER = changes
+changes: build
+	@echo "The overview file is in build/changes."
+
 clean:
 	-rm -rf build/*
 	-rm -rf tools/sphinx