Add push services (PushWoosh, Urban Airship), libraries - DraggablePanel, android-segmented-control

Paid push services:
- [PushWoosh](http://www.pushwoosh.com/) - no remote api in free mode, monthly pricing.
- [Urban Airship](http://urbanairship.com/) - has remote api in free mode, yearly pricing.

Libraries:
- [DraggablePanel](https://github.com/pedrovgs/DraggablePanel) - library for view draggable in corner (similar to YouTube app video player dragging).
- [android-segmented-control](https://github.com/hoang8f/android-segmented-control) - Radio buttons in iOS-like segmented style (also new category for radio buttons).