Added QML classes with simple realization to /qml folder.
KReversiChip and KReversiScene classes were deleted.
Added import of declarative libraries and /qml folder install code to
CMakeLists.txt.
KReversiView was rewriten completely to be QML container, now implements
simple user interaction.
Some changes to mainwindow.cpp due to absense of scene class, we will
use only KReversiView now.
Added install instruction to /pics/CMakeLists.txt for *.desktop theme
file.