[OS] bt_main - Close UART at last possible opportunity.
[DRIVERS] SDHCI - Added extra debug output. Added ioremapping.
[SHELL] add first implementation of ls shell command
[OS] Process - kernel tasks only have associated maps if virtual addressing is enabled.
[FS] ReadDir - Check valid handle.
[FS] BT_DIRENT - Added some attribute flags.
[FS] FullFAT - Support directory attributes.
[FS] FILE - BT_GetC - More standardised error handling.
[SHELL] Command interpreter can handle "" strings.
[SHELL] ls - Improved ls command.
[SHELL] cat - Added a simple cat command.
[ARCH] ARM - Only load necessary MMU sections.
[ARCH] ARM - v7-mmu Updated and fixed ARM mmu implementation.
[PROCESS] Ensure threads and processes have the correct MAP during thread startup.
[KERNEL] FreeRTOS - Fixed mmu switching.