bsnes v0.029

SFC模拟器 bsnes 发布新版,新版改进很大，如改进了DMA传输，主代码的清理，加入了自动检测文件类型功能，还有重写了视频图像滤镜代码，加入了50%抽线扫描显示模拟，加入了图形化的手柄按键设置器，等，详细更新内容如下:

Greatly improved invalid DMA transfer behavior, should be nearly perfect now
Major code cleanup -- most importantly, almost all PPU timing-related settings moved back to PPU, from CPU
Added option to auto-detect file type by inspecting file headers rather than file extensions
Rewrote video filter system to move it out of the emulation core 50% scanline filter added
Re-added bsnes window icon
Added new controller graphic when assigning joypad keys [FitzRoy]
Redundant "Advanced" panel settings which can be configured via the GUI are no longer displayed
Improved speed regulation settings
XP and Vista themes will now apply to bsnes controls
Added "Path Settings" window to allow easy selection of default file directories
Tab key now mostly works throughout most of the GUI (needs improvement)
Added two new advanced options: one to control GUI window opacity, and one to adjust the statusbar text