We read files from the formated disk
 - int access_block(int block, uchar * buf, int RW)	-> OK
 - int getSuperBlock(superblock * sblk)			-> OK
 - int fetch_file(char * filename)			-> OK
 - int get_stat(char * filename, stat * st)		-> OK
 - int read_file(char * filename, uchar * buf) 		-> OK
 - int remove_file(char * filename) 			-> PARTIALLY WORKING