[ANNOUNCE] Gujin bootloader version 2.5

[Etienne Lorrain <etienne_lorrain@yahoo.fr>]

There is a new version v2.5 of Gujin at http://gujin.sf.net with some
bugfixes and improvement, like:

 - Installer and boot code can be fully recompiled on 64 bits OS PCs,
 no 32 bits libraries needed.

 - support for FAT+ISO filesystem on the same device, so that you
 can transform an ISO image (by "./instboot boot.bin easypeasy-1.0.iso")
 to a superfloppy to boot (for instance) an EeePc from USB thumb drive
 or SD card.
 Some old EeePc may need an upgrade of their BIOS.
 Note for this one that there is a problem in the automounter of most Linux
 distribution and the resulting window appearing at device insertion shall 
 never be used (unless you see the boot.bio file).
 With such a modified easypeasy-1.0.iso, the ISOLINUX is still used, Gujin
 just simulate the BIOS disk converting reads of different sector size -
 more info in install.txt and "./instboot -h".

 - EXT4 is (partly) supported (if constant inode size), that part still
 need improvement but works for me.

 - more real mode segments are defined so that other people can add code
 easily.

 - When installing and asking to build a bootable FAT filesystem (complete 
 initialisation of a floppy or a thumb drive), support added for FAT32 and 
 autoselection of FAT12/FAT16/FAT32. When using FAT32, you cannot use the
 IDE interface to load the second stage bootloader (space restrictions in
 MBR).
 Nothing is changed to *probe* FAT32 filesystems, just stage 2 loading.
 The installer also try (by default) to align the data clusters of the FAT
 generated to the cluster size for performance reasons.
 The FAT32 filesystem checks good with another OS "chkdsk.exe" and
 obviously with Linux "fsck.vfat".

 - installer support /dev/mmcblk0, and /dev/mmcblk0p1 names as target
 (SD card)

 - some changes to EDID detection, is it working better for everybody?

 - The toolchain I use (GCC + Binutils + GMP + MPFR) can be generated by
 "make toolchain". I have compiled using GCC-4.2.4 to get a better code
 size and execution speed, but I tested the newer GCC-4.4 and it is
 working without known problem.

 - CC, GCC and CFLAGS variables can be used on the make command line

 - started but not finished support for GRUB_MULTIBOOT
 
I hope I did not create any regressions, at least I did not found any...

Note that the code to simulate floppies in Gujin can convert sector
sizes in between 512, 1024, 2048 and 4096 bytes/sector, and can be tested
by creating a bootable DOS filesystem image (of a floppy) named DOS.BDI
on a CDROM and booting it using Gujin, but that part is not new in this
version. I still did not test 4096->512 conversion, if someone has a 4096
bytes/sector HD, that could now be tested...

 Have fun,
 Etienne.