Remove calling services with a version

This removes calling services with a version. Services are no
longer added with a version in Sanford and the protocol no longer
supports passing a version. If "versioned" services are wanted,
the version identifier should be added to the service's name.
This is more flexible and makes it more clear that services can
be versioned independently.
Merge pull request #26 from redding/jcr-remove-version

Remove calling services with a version