How to align an ontology with COB

[sebastianduesing]

@matentzn suggested I create and post a COB alignment checklist. This is a first draft of that document based on my experience working on OBI's COB transition. The document will be added onto as more ontologies work their way through the process and we get a better sense for which steps are universally helpful and which are more ontology-specific. Other feedback is also welcome.