86F format handler updated to 86F version 2.0 and bit by bit handling;

FDI stream images are now also handled by the 86F handler;
Both floppy drives' motors now spin separately;
Added Plantronics ColorPlus emulation per patch from PCem forum;
Applied all mainline PCem commits;
Fixed several bugs.

src/disc_fdi.h

@@ -14,4 +14,3 @@ int fdi_hole(int drive);
 double fdi_byteperiod(int drive);
 void fdi_stop();
 void fdi_poll();
-int fdi_realtrack(int track, int drive);