Renaming and moving GM-script

[balour]

I installed the 1.7.4 version and made some change to it.

I rename the static script file to .pl from .cgi to differenciate both type.
I move the utility files to another folders at the same level of others script.
This mostly for compatibility with others scripts install on the server.

Any comment welcome.

[coldstone]

You would probably have to change the code if you changed files like 'gm-authors.cgi'.