Redid the way SCSI and ATAPI devices are handled;
Slight timings change in the NCR 5380;
Devices are now closed by device_close_all() in the reverse order of the one in which they were started;
Slight changes to some code in win/;
Added the WM_HARDRESET and WM_SHUTDOWN window messages for configuration manager purposes.
Several bug fixes;
Preliminar addition of the SDL 2 renderer (does not yet work correctly in full screen mode);
SCSI devices no longer have configurable LUN's (this matches the configurability of real SCSI devices);
SCSI LUN's are now handed by the device's handler;
Removed all unused strings;
Removed some unused code files;
Significantly rewrote the bus mouse emulation.