18.1119

• 68k: rework Z-flag calc
• 68k: better handling of STOP, restart on exception
• 68k: RESET instruction should only reset external devices
• build: load version from manifest
• dma: fix fill and copy
• emu: basic cheat codes support
• emu: compute checksum and add autofix checksum
• fm: rework timers
• sram: write to file only on close
• ui: default scale set to 2
• vdp: rework rendering engine
• vdp: sprite masking, handle simple case
• vdp: shadow highlight - needs work
• vdp: refactor timings
• z80: fix reset logic