Debugged and tested main file system utilities

	Main file system utilities were proved stable by moderate testing

		Those utilities include:
			initialize the ext2 file system
			create directory
			create file
			add file to directory
			add hard link to directory

		And several other more minor utilities like:
			get inode data from inode table
			get a specific data block from a file
			etc.

	Currently creating a set_current_directory function