Refactor charts for more modularity

[arnoweiss]

I'm not happy with the current structure of this helm chart. Currently, there's one chart with a set of others pulled in as dependency charts. This works great as a first step but there's other options. I've listed my preferences below:

1. Have a single chart with a Deployment resource for each microservice
2. Leave everything as-is.
3. One chart for each service and leave composition (incl pointing to databases and brokers) up to the deploying party. Could leave people to deploy each multiple times which is obviously stupid.

[arnoweiss]

4. One chart for each service and an umbrella, separately obtainable from the helm repo