* spu.c: Bump to version 0.3; make all space dynamically sized

	* spu.c: Bump to version 0.3; make all space dynamically sized
	and allocated, add generation of library constructs of which
	only a given percentage are used in the generated program.
	(main): New options --lib-enums, --lib-functions, --lib-macros,
	--lib-structs.
	* README: Update version number.