* js/main.js: Added validation to model.
              Added event listener to 'Task' view on init.
* README.md: Finished 'custom events'.
* js/main.js: Added ability to destroy tasks.
* README.md: Finished "Destroying Models".
* index.html: Added form to add task.
* js/main.js: Added 'AddTask' view and funtionality.
* js/main.js: 'App.Views.Tasks' now listens for 'add' events on collection.
* README.md: Finished 'Creating new Tasks'.