package.json updated by npm install --save-dev broccoli-coffee
app/app.js -> coffee
app/router.js -> app/router.coffee
app/adapters/application.js -> app/adapters/application.coffee
app/controllers/todo.js -> coffee
app/controllers/todos.js -> coffee
fix zero-parameter method call lacking parentheses in adapters/application.coffee; app/models/todo.js -> coffee
README add coffeescript