No$gba v2.4b basic DS Wifi emulation (*), and full GBA e-Reader emulation

*) no$gba/wifi can send/receive packets, commercial programs are still getting stuck somewhere in transmission. For example, with pictochat, slave machine(s) are realizing when a master machine is creating a chat room, but the slaves aren't sending response packets to the master. Probably due to some still undiscovered status/control bits. I've added a bunch of new info about wifi hardware in no$gba help text (debug version). Additional info on the missing bits and bytes would be very welcome!