Simul efun: ls - list a directory like on Unix-like systems

Synopsis:
	void ls(string path)

Description:
	List the files in the directory pointed to by 'path' onto the
	screen of the user ('this_player()').

Note:
	This simulated efun is used by the command 'ls' - see 'man ls'.

See also: efun/get_dir, efun/directory, w/ls