v005

20181010

• 68k and z80: use delays when handling vdp interrupts
• 68k and z80: process interrupts when halted
• 68k: fix f-line and a-line emulation
• 68k: fix Zero flag when doing add.b or add.w
• 68k: rebuild lib
• emu: fix rom wrapping
• emu: init I/O control port to 0 - fixes SGDK
• fm: dac 13 bit, avoids clicks
• sram: add save/load support
• vdp: add support for VRAM 8-bit read