* Added mapper # 40, 42, 44, 67, 68 and 72.
* Added disassembly for debugging cpu and important registers.
* Fixed mapper # 41, 64, 65 and 90.
* Fixed apu's length counter timing in mode 0 and 1.
* Fixed APU irq timing.
* Fixed save state which hang sometimes due to cpu timing.
* Fixed: browser doesn't run at startup after you check that option.