Updated todo in framework with slightly more detailed todo; implemented unregisterService in rpc server
added Rpc/Server aware interface/trait; renamed ServiceDiscovery to ServiceRegistry and added aware interface/trait
added serviceregistry init to framework activator
added service registry to context
attached context to framework before calling frameworks activator start; added registryService hooks
ltrim'd leading . from routeBinding name
added setService and unsetService to serviceLocator
added service registry classes and interfaces
updated package reference adding sample calculator bundles (will likely be removed at a later date)
tweaked receive/send test scripts to use calculator service