RemoteLinux: Overhaul deployment infrastructure.

- Introduce generic and Madde-specific deploy configuration widgets.
- Move project file update logic into dedicated class.
- Generic deploy configuration widget no longer has the ability to change deployment settings via the GUI, because we cannot know which qmake scope to use for that.

Change-Id: Ie542a0852c8aa1c6b416cd7aece4e48c1cc2de7c
Reviewed-on: http://codereview.qt.nokia.com/2445


Reviewed-by: Christian Kandeler <christian.kandeler@nokia.com>