Generate account resource
Merge branch 'master' into add_account

Pull in addition of pry-rails
Add accounts integration test
Pass account index listing spec
Remove stylesheets

They don't apply to an API-only app.
Add (mostly) failing tests
Add account show, create, and validation
Respond without body to successful account create

Also then removed the associated test of the response body.
Add failing account update test
Pass initial account update test
Add failing update test with nil name
Pass update test against nil name
Add failing delete account test
Pass delete account test