disktype-9.1

This (unofficial) forked release, "disktype 9.1", includes the following changes:

• extended Atari partition (XGM) patch at http://sourceforge.net/p/disktype/patches/5/
• FreeBSD disk size patch at http://sourceforge.net/p/disktype/patches/4/.
• ext4 support adapted from code at https://github.com/Pardus-Linux/Packages/tree/master/system/base/disktype/files
• exfat patch adapted from code for the Gargoyle Router project at https://github.com/ericpaulbishop/gargoyle/tree/master/package/disktype/patches.