use service script from concerto repo

This addresses #44 and the only way to test it (until a version of concerto is tagged, since it now includes the service script that this depends on) is to run the ./build... script with the `-v master` argument which will create version 0.0.0.master from the HEAD of the master branch, into the packages.  Yep it's a new feature.  [And since they're versioned at 0.0.0 I'm thinking that it should not impact anyone if we happened to release it to the packages directory on the server-- but we don't need to, to test this].

If you run it without the `-v master` it will work as it did before, which is to get the latest tagged version and build that.  (And it will blow up, since the service control script doesn't have the name we expect until _after_ the 0.7.0 release.)

Anyway, merge when you're ready for the next build.