Added initial support for virtual memory. init_vm initialize virtual memory but now it consider 4GB as physical memory. Added this changes in makefile and added some requirements on TODO file

Added scroll_text function, vga function to get a character from a position and kernel.c was modified to test those functions

Added screen module which manages the screen (vga text mode), the cursor and the position where to print the characters. This module was added to Makefile

Modified project structure. There is no more hal folder and it content was separated in different folders (drivers, boot, paging)

Fixed vga memory to virtual address, added two macros for convertions between physical and virtual address

Added a Makefile, a linker script, changed kmain.c file for kernel.c. Also boot.s enable 4mb paging, set the kernel page directory and call the c main kernel

Added kernel/ directory, which cointains kernel related files. Added kmain.c file (the high level of halos kernel) and params.h (soma parameters of kernel like kernel stack)

Changed void pointers to char pointers on the implementation of qsort and bsearch to get one byte at time