* omega.h: Don't include config.h, don't include params.h again if
	omega.h has already been included.
	* graphite-poly.h: Include sese.h.
	* graphite.c: Don't include sese.h, remove needless includes and 
	minimize includes outside #ifdef HAVE_isl block.
	* graphite-blocking.c: Don't include sese.h, remove needless includes,
	and wrap entire file in #ifdef HAVE_isl
	* graphite-dependences.c: Likewise.
	* graphite-interchange.c: Likewise.
	* graphite-isl-ast-to-gimple.c: Likewise.
	* graphite-optimize-isl.c: Likewise.
	* graphite-poly.c: Likewise.
	* graphite-scop-detection.c: Likewise.
	* graphite-sese-to-poly.c: Likewise.

From-SVN: r225741