ZSNES 1.51

[Mike Swanson]

Hi,

I've noticed ZSNES hasn't been updated in years, but I don't really know how 
to update it myself (I've tried, but it always fails at compiling at various 
ports; knowing emulator authors, it's probably filled with Windows and/or 
Linux-specific code anyway).  I'm CCing this to both the official maintainer 
and the mailing list because I don't know if he's even still around anymore.  
Usual improvements are expected, increased compatibility, more features, etc 
(and a *real* NTSC emulation mode that's to die for).