Nikita Yaschenko, 2538

* Supports http://www.w3.org/2005/Atom rss format
* Used `android.sax` for parsing
* You can update list of channels or list of posts for specific channel with swipe gesture (`SwipeRefreshLayout` used for this)
* Long-click channel opens menu, where you can delete this channel
* Invalid rss channels (not atom) are not added