first round of scheduler refactoring, with all tests passing

 - add concept of cluster for external job scheduling
 - first pass at new container api with mock scheduler
 - simplify build + config = release
 - deprecate configuration management and provider packages
 - deprecate node management features (formation/layer/node/provider/flavor)
adapt web app to new cluster domain object
remove deprecated cm and provider packages from test and coverage
wip on client changes for scheduler branch
remove slug metadata from builder
first pass at deis meta project
add deis meta project to root makefile