Purpose of this example is to test how collections can be used to display things in a page.
1. Loads Twitter #movableapp's feeds via jQuery::getJSON() method.
2. Reset the TweetsCollection instance
3. Fill the collection with Twitter's results
each Tweet item's view listen to it's model's change event so it is possible to alter tweet data an see interface uptates according.
App.tweets.models[0].set('text','foo text...');