Update Bios 701c

[Bill Bryan <billb@rust.net>]

to 3n dated 11/95.  (note: my 701c is only 5 weeks old)  Update performed
correctly although instructions were not clear.  Basically unzip EXE file in
empty c: drive directory.  There are 6 files not counting original
SYS7013N.EXE, some of which are docs.  Then format a 3.5" floppy with boot.