Simple developer scenarios can be done solely in terms of Stacks. However, to
support more sophisticated cases -- where multiplexing many Stacks onto a shared
set of resources is preferred (for cost savings, provisioning time savings,
control, etc) -- we need to introduce the concept of a Cluster. Each Cluster has
a fixed combination of IaaS/CaaS provider, decided at provisioning time.
This just contains primarily scaffolding, however lays out a general direction
and table of contents for the metadata specification document (marapongo/mu#1).
This doc will describe the overall architecture for the Mu tools, platform,
and related artifacts. It will be a companion to the more detailed drill-down
into the Mufile format and its specific target transformations (marapongo/mu#1).
There are tons of todos, etc., however this is at least a start, with some
amount of conceptual overview plus scaffolding and structure to fill out.
