Log Message:
Update to 4.0.1, from Nicolas Thauvin.

4.0.1
	* Minor bug fixes, patch submitted by Damien Doligez

4.0.0
	* Stop supporting the autoconf build. (It might works though.)
	* Instead of autoconf, using omake and ocamlfind
	* Subpackages: no need to link codes for uninterested format.
	* Stop supporting lablgtk1
	  - Ximage2 module is now Ximage, and the older Ximage is removed
	  - OXimage2 module is now OXimage, and the older OXimage is removed

3.2.0
	* Misnamed version. It should have been 3.0.3 or something.
        * Small bug fix for image load memory allocation vulnerability

3.0.2
        * O'Caml 3.11 port.
	* Integer overflow vulnerability fix for pngread.c

3.0.1
        * Alpha channel support for png images.

3.0.0
        * new version numbering scheme
        * autoconf and makefiles cleanup
        * fix examples compilation

2.2.1
        * Now compiling with -warn-error -A