* oln/io/se.hh, oln/io/se_window.hxx,
	oln/io/se_neighborhood.hxx: New files.
	* oln/basics2d.hh: Include io/se.hh
	* oln/core/internal/window.hh: Add operator==.
	* oln/core/neighborhood2d.hh: Make it readable.
	* oln/core/window2d.hh: Likewise.

	* oln/io/pnm_write.hxx, oln/io/pnm_read.hxx: Bug fix.
	Tiny binary images in raw pbm format was not correctly
	read nor written.

	* demo/morpholena.cc (main): Add window2d loading example.
	* img/face_se.pbm : New image.
	* Makefile.am (EXTRA_DIST): Modify accordingly.

    prcs2git-id: 0_5.88