Update Ember to 1.3.0, Ember-Data to 1.0.0-beta.6, move to vendor/
Use CP's for reamining and completed
Add pluralize helper, remove html from controller
Add TodoController.removeTodo method

We want to avoid debouncing a call to `send`, so we make `removeTodo`
a method on the controller, and have the `removeTodo` *action* simply
call that method.
Move Todo auto-save from model into controller