release: add People model, views, controllers, and tests.
Merge branch 'feature-implement-people'
chore: add Procfile to be served on Heroku
chore: configures unicorn to deploy to heroku
chore: Procfile switch to use webrick, workaround for unicorn bug
chore: delete extraneous people_helper spec file
chore: adds tests for People model
chore: cleanup person specs