Initial Skeleton of the Qt Gui
Merge branch 'qt' of https://github.com/tcanabrava/subsurface into qt
Removed the qt-gui directory.

I tougth I had moved the qt-gui diretory to qt-ui, but it seems
that I copied, or something.

Signed-off-by: Tomaz Canabrava <tcanabrava@kde.org>
Added a CMake build system for and make the Qt ui and GTK ui appear

The CMake build system was not added to change over the Makefile one
but simply because I'm more proficient with CMake, and spend more than
a day trying to understand how the MAkefiles works.
The Makefile gurus can take a look at my cmake and port the stuff to
Makefiles :)

Besides that, I'v made the correct calls to the Qt methods so the two
uis ( gtk and qt ) can coexist for a while, helping on the translation
of the GTK port to Qt.

Signed-off-by: Tomaz Canabrava <tcanabrava@kde.org>