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.