Sugarbox v0.21

+ [CRTC0] :Add support for CRTC 0 : Few demos may not worked, but lot's of them do (including the impressive  Shadow of the beast  preview from Overflow)
+ [CRTC1] : Fixed a little error in the CRTC, preventing  Chany dream 2? from running properly.
+ [CRTC] : Fixed a case where HSync falling edge is not detected ( Chany dreamend part 8 is now displayed correctly)
+ [Display] : Fixed an incorrect behaviour of Screenshot function, that used to take incomplete screenshots
+ [Display] : Adjust a bit position of the screen
+ [SNA] : Fixed some bugs with snapshots that have VBL bit = 1 in the PPI.
+ [SNA] : Fixed Vertical Adjust improper in snapshots
+ [FDC] : Fixed a rare case where, in a Kryoflux RAW file, the index is missing from the stream (which caused a crash to occur)