Merge attempt

audio_hw.tcl

final_sd_interface_hw.tcl

osu_fpga_toplevel.qsf

osu_fpga_toplevel.sv

otogame.qsys

software/audio_sd/main.c

software/audio_sd/sdcard/crc7.c

software/audio_sd/sdcard/diskio.c

software/audio_sd/sdcard/diskio.h

software/audio_sd/sdcard/ff.c

software/audio_sd/sdcard/ff.h

software/audio_sd/sdcard/ffconf.h

software/audio_sd/sdcard/ffsystem.c

software/audio_sd/sdcard/ffunicode.c

software/audio_sd/sdcard/integer.h

software/audio_sd/sdcard/sd_hal.c

software/audio_sd/sdcard/sd_hal.h

software/audio_sd/sdcard/sd_hw.h

software/audio_sd/sdcard/sd_lib.c

software/audio_sd/sdcard/sd_lib.h