Add new feature to show feed list and delete existing feed.

Add new feature to show feed list and delete existing feed.

Here is some example screenshot :D

- "List" menu button is added
![enginereader](https://cloud.githubusercontent.com/assets/239598/4781009/47ccb8a8-5c84-11e4-8ea9-e8baf11d52b8.png)

- RSS Feed List example. Long length title will wrap automatically. If user clicks trashcan button, specified feed and entries will be deleted.
![10_26_14__5_18_am](https://cloud.githubusercontent.com/assets/239598/4781012/716b5d68-5c84-11e4-8e21-6ab6b219d76f.png)