Tutorial for creating an application and build on openshift v3

This tutorial will continue to evolve to include things like deployments, deployment triggers, and private docker registries.

Is there a better way to do this?  For instance, deleting all the pods, services, replication controllers, etc with a given label?  I don't really like framing this as the "hey, some scripts that hack around with your setup", I'd rather have them just clean up after themselves using only the API.