command/cloudformation: add describe-stack-resources.
main+module: wire in describe-stack-resources.
command/cloudformation: add 2 columns to describe-stack-resources output.
all: make classes final where possible.
util+command: make static classes final where possible.
command/cloudformation: add a StackStatus enum.
command/workflow: add a rough, custom test-release-candidate command.
main+module: wire in test-release-candidate.
command+main+module: remove obsolete deploy command.