added libtool-stuff

[[Imported from SVN: r252]]

.gitignore

@@ -8,4 +8,5 @@ depcomp
 install-sh
 missing
 mkinstalldirs
+libtool
 dune.pc
\ No newline at end of file

autogen.sh

@@ -4,6 +4,11 @@
 # barf on errors
 set -e
 
+echo "--> libtoolize..."
+# this script won't rewrite the files if they already exist. This is a
+# PITA when you want to upgrade libtool, thus I'm setting --force
+libtoolize --force
+
 # prepare everything
 echo "--> aclocal..."
 aclocal