[KERNEL] Add ELIBBAD to errno.h
[KERNEL][PROC] Elf loader is now on separated file
[KERNEL][I386] Correct bug in arch_back_trace()
[KERNEL][I386] Correct bug on unmap_mirror()
[KERNEL][I386] Correct bug on page_fault_handler() and COW handling
[KERNEL][AS] Rewrite as_copy() to have the desired behaviour
[KERNEL][SCHEDULER] Correct scheduler_update() to have desired behaviour
[KERNEL][VFS] Correct bug on device_read_write()
[KERNEL][AS] Add as_clean()
[KERNEL][PROC] Add thread_update_exec()
[USERLAND][DRV] Correct undefined behaviour on Ext2 read
[KERNEL][PROC] Add partial implementation of execve()