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.
Don't force always debug build.

It should be specified as a parameter CONFIG+=debug when running qmake.
Merge pull request #45 from leppa/blackberry10-port

Blackberry 10 Port
Update README
construct a QUrl using addQueryItem()
include cleanup
no need to adjust LIBS and INCLUDES for declarative cache usage
compile with organizer features on any platform
make building for a certain platform explicit

* allows to compile e.g. the QML versions w/o having to change sources
make compiling with MDeclarativeCache optional

* allows to compile QML versions on the desktop w/o having to build the declarative booster or having to change sources
actually append to string
Merge pull request #46 from shentok/cleanup

Tweak build system for compiling different variants on the deskop