gem install ng-rails-csrf

Angular.js needs CSRF token to avoid Rails protection.
Remove todos using angular
bundle uninstall turbolinks

Turbolinks not so useful when using angular.
New todo with anguler
Merge branch 'new-todo-with-angular'
Show done check box on not editing
Submit on enter todo
Modify todos with angular
Save todo on done state changed
Merge branch 'editable-with-angular'
Focus todo on editing
Don't save todo if empty
Refactor html

表示時と編集時のHTMLをまるっと分けた。
混在させるとあとあとわかりづらくなる