S235 Revox Joy Control

Jan 30, 2018

- Update Cling library to version 2.1 and resolve all problems related to a new API
- Set target API 26 (Android 8)
- Make foreground service for https server (add notification) because background service is killed by system at Android 8 when app in background
- Stop https service when task is killed
- Remove Revox logo from title bar for all views
- Customize Back button
- Apply center inside scale factor for browse images