Add: link to the scripts repo with libexec, and add LOT of services


I add a submodule as libexec with the plugisn repo (so it will be installed in the libexec of the user with lastest shinken version).

I also add bunch of services and commands. with macros of course. We need to check the one in the linux.pack to see if we match them.

can you shinken publish it? thanks :)