Disabling the Attitude Indicator for non map view would leave a blank screen.

Added Bing Hybrid Map
Added Open Street Map
Set map selection menu checks (exclusive check)
Handle proper image type otherwise disk caching fails

As this is no longer google specific, renamed everything google to qgc.

Getting sloppy...

It now shows "Show" or "Hide" Status Bar depending on the current state.

- All resources are either under src or under resources dirs
- Removed files top level directory
- Move flightgear files to top level dir

Use default font wherever possible. Where that doesn’t work, use
ScreenTools::dpiAdjustPointSize.

New version using QtQuick along with an experimental Map Background

Since debug console maintains a list of links it needs to use shared
pointers so it doesn’t run into the link delete ordering problem.