Add more realistic services

[chrisbsmith]

The training guide currently only documents the deployment and configuration of the Fibonacci service. While this is a very useful introduction, it is not a very realistic demonstration and doesn't showcase the real powers of the mesh. Most customers will deploy services that need to communicate with another service in the mesh. Documenting this type of deployment will provide insight into the extra Grey Matter mesh objects needed to route traffic from a service -> proxy -> service.

These workshops are a very thorough guide for getting the mesh up and running and many customers are referencing them already. Adding additional, more complex scenarios/examples here would seem an ideal fit.