#2 update documentation

[nethope]

1. I notice the README in the tarball is older and should probably be replaced with the text of http://sssh.sf.net/ instead.

2. Under section 2.1, I would make these changes:
< cp sssh.cfg to /etc/sssh
< cp sssh ssh_create scp sssh_funcs /usr/local/bin
> cp sssh.cfg /etc/sssh
> cp sssh sssh_create sscp sssh_funcs /usr/local/bin