A build option is introduced to file CMakeLists.txt. Classes Tiling,
Tile and TilingLayouts are only built if the option is set to ON. #ifdef's
are added to the classes where functions of the excluded classes are called.
It is possible that adding this build option broke the Scripting
component. This is something that should not happen. Unfortunately
by just ifdefing everything scripting related with scripting enabled
we have build errors. These are caused by the fact that the scripting
code includes e.g. client.h through "./../client.h". At one offending
place I changed that to "client.h", but there is also a client.h in
the scripting directory.
The includes and naming of the scripting files clearly have to be fixed!
Since the TabBox functionality is not feasible for any platform KWin is
used on (e.g. tablet PCs), a build option is added to decide, if the
TabBox functionality should be build or not.
REVIEW: 101511
@Sebastian: Martin wanted me to let you know that it is now possible
to disable building Tabbox
CCMAIL: sebas@kde.org
