code: function() {
  			var todos = todosDB.getList();
  
  			var completedCount = 0;
  			for (var i = 0, len = todos.length; i < len; i++) {
  				if (todos[i].completed) {
  					completedCount++;
  				}
  			}
  
  			var itemsLeft = todos.length - completedCount;
  
  			this.updateItemsLeft(itemsLeft);
  			this.updateCompletedButton(completedCount);
  
  		}
docs: Updates todo counts based on what is in the todo DB
  @returns {void}