Added Symbian Qt Components adaptation for BlackBerry 10 as a submodule.

More information is available in 3rdparty/README.txt file.
Initial BlackBerry 10 port.

Current status:
- basic flow works;
- GPS positioning and adding to calendar doesn't work;
- landscape mode doesn't work;
- UI needs some fixes.
Updated UI components that looked too small.

Bigger graphics are needed at some places.
Switched the original Qt Components adaptation to my own clone.

This is due to a need to quickly patch SearchBox in component's extras.
Added support for GPS positioning.

There is no QML plugin for location services on BlackBerry 10, so a
wrapper that implements minimal required functionality was created.
Don't show Nokia privacy notification on BlackBerry.
We don't need location services, just geolocation.
Implemented adding to Calendar on BlackBerry.
Replaced PNG icons with SVG ones.

Calendar and location picker icons were vectorized from their PNG
versions.