Merge pull request #7 from davestern/README-remove-unstable-arg

Updated README to reflect current arguments
README: Adjusted argument quantity in examples.

The script will not execute correctly and report usage if
only 7 arguments are specified and a username and password
are used.

I added $ARG8$ to the command definition and removed the extra
argument from the define service example.
Merge pull request #8 from davestern/README-arg-quantity

README: Adjusted argument quantity in examples.