uBee512 v5.3.1

An emulator for the Microbee Z80 ROM, FDD and HDD based microcomputers.

New for this release:
* Added Microbee Technology´s p1024k/1024k (pplus) model emulation.
* Added SPEED output value to --tapfile-list option.
* Added DS8B (and D8B) Beeboard raw file format.
* Added libdsk-1.2.1a-ubee.patch.zip patch to the patches directory. This contains the existing Microbee Dreamdisk and a rpctios.c patch.

Changes:
* Added p1024k/1024k Premium Plus model entries to ´roms.alias.sample´.
* Added ´p1024k.dsk´ to ´disks.alias.sample´.
* Changes made to --tapei-det option to take a percentage value to be used for high and low threshold levels with simulated hysteresis on the tape input of WAV files.
* Changes to ´remote´ type to allow the new USB Floppyio external floppy interface to use full capabilities.
* Added ´hs350´, ´hs525´ Honeysoft and ´ds8b´ and some other formats to libdskrc.sample.
* The Slax build has been removed from the distribution packages.

Fixed:
* Building could break because some C source files had used SDL and GL in the include paths, these have been removed, the include path is determined by the Makefile.
* Fixed remote ´serial´ on Unix builds to allow serial to use full potential speed (LibDsk library fix).
* Fixed Floppy slowness problem on buffered LibDsk remote connections for ´hs350´ and ´hs525´ formats.
* Fixed a DS80 format remote floppy access issue.
* Fixed leading ´/.´ problem that caused code to crash in file specification.
* Fixed game disk file names in ubee512rc.sample to match MSPP image names.