fusee: Improve integration with the new logging system ...

fusee: Implement log level configuration from BCT.ini

Add and fix copyright notices for better GPL compliance (thanks @naehrwert and @CTCaer).

Fusee: Deployed new SDMMC driver in fusee-secondary. All stages boot now. ...

Fusee: Fixed wrong argument in se.c function.
Fusee: Improved timers.

fusee: Temporarily disable anything that prevents the fusee-primary to fusee-secondary transition.

Pass screen status and mmc struct from stage1 to 2

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

Don't pass the mmc struct around

Instead of passing FatFS structs around, unmount; other changes

Merge SD stuff into fusee-secondary. Switch diskio to single-sector reads temporarily

Update argument passing, add video resume

Fix start.s in stage2 of Fusee for argc/argv