Fix strncpy bugs in fusée, etc.

Make loadlist empty when booting Horizon, more nxboot.c code

Write all the needed pk1 code and a large part of the nxboot function

[stage2] Add debug printf in main.c

[stage2] Add dump_to_file

Rename sd_utils to fs_utils, etc

[stage2] Support sector sizes up to 4K in FatFs. ...

Note: SD cards always have a sector size of 512 bytes.

[stage2] Implement disk_status

Redesign fs_dev, raw_dev, introducing device_partition and switch_fs. ...

In theory, one could mount an encrypted FAT partition itself coming from a disk image, etc.

[stage2] Add console_get_framebuffer

[stage1] refactor diskio.c

[stage2] Accomodate raw_mmc_dev to latest sdmmc driver changes

stage1 -> stage2 again

[stage1] unstub multiple sector-r/w code

fusee: undo a silly mistake in longer-than-8K operations

We actually need the pk1 key

Merge pull request #93 from encounter/fix/stage2-args ...

Fix stage2_args_t mismatch

Fix misconception in latest commit

[stage2] Refactor key_derivation type and function declarations

Move sd init into diskio.c, write code for latest commit

fusee: allow sdmmc_read / sdmmc_write of more data than fits in the bounce buffer

Add code to register rawnand, boot0, and bcpkg2

raw_mmc_dev: fields should be u64

[stage2] Implement package1_parse_boot0

[stage2] Add bct.h

Apply sdmmc stage1 changes to stage2

fusee: actually obey the SD spec when switching voltage

[stage2] Add GPT parsing code (tested on PC)

fusee: support low-voltage SDMMC mode

fusee: use full bus width and faster initial clock speed