Ember.js Clear Completed Tasks Update

Resubmission of Knockback including an upgrade of Knockout to 2.0.0

Fix up Backbone.js with RequireJS

Did some fixes to the ember.js app.

This is probably not the most graceful implementation, but it should get the job done for the time being.

Separate storage fix

Remove tight coupling between model and view.

Use the normal event bindings to perform the close/blur event.  Set content directly in the template.

Prevent backbone.js example from unnecessarily polluting the global namespace.

Added :focus styles to clear link to allow for keyboard navigation

tab to the "clear all" link. Only CSS was changed save fidel, which needed an
href on the link to allow tabbing to it.  I did not edit source (less,scss)
files.

Implemented a new SpineJS version using CoffeeScript with the latest SpineJS 1.0.5