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NES: Improved timing to fix a few games
To fix Battletoads Double Dragon I did the following things: 1. run the CPU before running the PPU 2. Ensure hblank interrupts happen no earlier than cpu cycle 86 3. Removed the float counters, we don't need that (in)accuracy These changes also fix other games like SMB3 and Kirby (the bottom window jumping around) and I was able to get rid of the MMC3 hack entirely. IMPORTANT: I'm sure this will break other games and hopefully I remember to do more testing before merging to master...
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