Include documentation from xfce4-docs

.gitmodules

@@ -0,0 +1,3 @@
+[submodule "doc"]
+	path = doc
+	url = git://git.xfce.org/xfce/xfce4-docs

Makefile.am

@@ -1,5 +1,6 @@
 SUBDIRS =								\
 	po								\
+	doc								\
 	src
 
 desktopdir = $(datadir)/applications

autogen.sh

@@ -10,18 +10,9 @@ EOF
   exit 1
 }
 
-echo 'dnl *** This file is automatically generated from configure.ac.in ***' > configure.ac
-echo 'dnl *** DO NOT EDIT! ***' >> configure.ac
-echo >> configure.ac
-
-linguas=$(ls po/*.po 2>/dev/null | awk 'BEGIN {FS="[./]"; ORS=" "} {print $2}')
-if [ -d .git ]; then
-    revision=$(git log --pretty=format:%h -n 1)
-else
-    revision=UNKNOWN
-fi
-sed -e "s/@LINGUAS@/${linguas}/g" \
-    -e "s/@REVISION@/${revision}/g" \
-    < configure.ac.in >> configure.ac
+test -z "$XDT_AUTOGEN_REQUIRED_VERSION" && \
+echo "You need to update your version of xfce4-dev-tools" && exit 2
 
+XDT_AUTOGEN_REQUIRED_VERSION="4.7.3" \
+XDT_AUTOGEN_CHECK_DOCS="doc" \
 exec xdt-autogen $@