Generate a better changelog.

Makefile.am

@@ -23,7 +23,13 @@ upload-doc: doc/html FORCE
 	ssh $(webhost) rm -f '$(doxdir)/*' || true
 	scp -r doc/html/* $(webhost):$(doxdir)/
 
-fonts: tools/makefont
+update-changelog: FORCE
+	git --help >/dev/null 2>&1 \
+	  && test -d .git \
+	  && git log --stat | grep -v '^    \(git-svn-id\|$$\)' \
+	      | sed '/^Author:/s/ <.*@.*>//' > ChangeLog
+
+update-fonts: tools/makefont
 	tools/makefont mono9 "Monospace 9" 96 4 >| $(srcdir)/caca/mono9.data
 	tools/makefont monobold12 "Monospace Bold 12" 96 4 >| $(srcdir)/caca/monobold12.data