Since CI Artifacts and Testing are quite sophisticated for bigtop, lets curate as part of the source a graphviz file which diagrams the bigtop architecture and outputs.
That way - our infra is transparent and we can all pitch in to lend a hand .
Better yet, maybe we can all play around with different CI's (that is really the value of docker i think - it makes the build server a much less fragile and easily replaced element of the stack).
And an image is worth 1000 words, so i think rather than another README, a good graphviz file to generate the diagram of CI will be awesome.
Also, we can in the diagram contain how to use the vagrant docker recipes to test build artifacts.