* gegl/gegl.h: modified order of arguments for gegl_node_blit (scale
	comes before rectangle) as well as added GEGL_AUTO_ROWSTRIDE =0 define
	to be used for automatic computation of rowstride for gegl_node_blit
	and gegl_buffer_get
	* gegl/buffer/gegl-buffer.[ch]: modified order of arguments for
	gegl_buffer_get() as well as added a rowstride argument.

	These files in the gegl core needed changes to adapt:

	* bin/export.c:
	* bin/gegl-view.c:
	* gegl/buffer/gegl-cache.c:
	* gegl/buffer/gegl-interpolator.c:
	* gegl/graph/gegl-node.[ch]:
	* gegl/operation/gegl-operation-point-composer.c:
	* gegl/operation/gegl-operation-point-filter.c:
	* gegl/operation/gegl-operation.c:
	* gegl/process/gegl-processor.c:

	And all operations were touched as well.

	* operations/*/*.c:
	* operations/*/*/*.c:

svn path=/trunk/; revision=1651