Update 2016-raleigh.yml
Update 2016-raleigh.yml

adding dates, and removing a sponsor level we aren't going to track

Former-commit-id: 69d714da80b2310d23f1b34e93bab93620fe7814
gomex/devopsdays-web,gomex/devopsdays-web,gomex/devopsdays-web,gomex/devopsdays-web