* configure.ac: Require Automake 1.8.3. Use --with-strategoxt and
	--with-sdf. Cleanup error messages.
	* src/specs-renamed/Makefile.am: Clean.
	* src/specs-renamed/rename.str: Fix module name and main strategy name.
	* src/sdf/Makefile.am: Use unpack instead of unpack-sdf.