Changes

*<code>.HDD</code> / <code>.IMA</code> / <code>.IMG</code> (Raw hard disk images)*<code>.HDI</code> (Hard disk images Image used by emulators for NEC PC-98)*<code>.HDX</code> (A derivative of <code>.HDI</code> with a more compact header as well as support for images larger than 4GB)*<code>.VHD</code> (Virtual hard disk imagesimage; Support fixed-size, dynamic-size or and differencing VHDsdisks)