Draw very first assumption of architecture

As mentioned in Design Concerns, the architecture is the end result, but in order to fill in we need to iterate. Therefore, a working picture of the assumed types of interacting parts (hardware and software components) and their links is a good step to start filling in the potential technologies that fill each of those roles and the protocols that can fill each of those communication links.

Therefore, this is roughly speaking the first task (in parallel with requirements gathering maybe VCS-12)