Write tutorials to better document Concierge features

[parasdsingh]

• Hello World service
• Hello World integration
• Moderately complicated module handling multiple sub-commands (helps illustrate the use of event.arguments)
• Module that passes data between different integrations

[parasdsingh]

@mrkno It looks like I won't be able to make the time to get on this anytime soon and I've already delayed this a lot 😞.

Should we close this issue or let someone else handle it?

[drkno]

Let someone else handle it. It needs to be done at some point.