Refactor stage1's and stage2's main.c files

Don't deinit the display yet, for now

Fix bug in crt0

Make di.c accept arbitrary FB addresses, fix flickering issues

[stage2] Forgot to change that, too

Fix faulty IRAM check in check_32bit_address_range_in_program

Fix inverted condition issue in check_32bit_address_range_loadable

[stage1] Fix DEFAULT_BCT0_FOR_DEBUG

Rewrote crt0, init, and chainloading code ...

start.s, init.c, linker.ld and linker.specs are meant
to be re-used by user applications, should they remove the defines
from init.c and the .chainloader* sections from the linker script

Simplify fsdev_set_default_device

Loader: Fix char * const correctness.

SM: Match official SAC validation behavior.

Loader: Fix game update content loading, fix SD card mounting on newer firmwares. Closes #61.

SM: Fix svcGetSystemInfo bug, now works on 5.0.2.

Merge branch 'master' of github.com:Atmosphere-NX/Atmosphere

Fix warning/error, etc. in fs_dev.c

Fix minor bugs in loader/sm

libstratosphere: Make boolean autoparsing match official semantics.

Fix fsdev_set_default_device bug

ProcessManager: Fully implement pm:dmnt. Remove debug logging.

ProcessManager: Refactor resource limits, complete pm:shell.

[stage2] Fix the ordering of rules in linker script

ProcessManager: Fix Synchronization. Now works on 1.0.0 hardware.

fusee: fix boot partition selection

fusee: fix regression in card detection

fusee-secondary: don't create 3GiB output files :)

Add chainloader (stage2) (need to edit more files)

Rework fs_dev mount code

Revert "Fix mount code in fs_dev.c" ...

This reverts commit 306555e.

Upgrade FatFs to R0.13b