Most of this is straightforward. Some more complicated changes are in
1. libkdegames: I needed to fix the headers <KgAudioScene> and
   <KgSound>, which did not refer to the right include location when
   installed.
2. kgoldrunner: Its CMake code may not depend on OpenAL and libsndfile
   anymore. KGoldRunner therefore now uses the new
   <libkdegames_capabilities.h> header and enables sound only if
   KGAUDIO_BACKEND_OPENAL is set.

KMahjongg and KShisen are not done yet. I could not create a
config-script for KMahjongg because CMake currently gets confused over
exported targets in multiple source directories. (D'oh...)

svn path=/trunk/KDE/kdegames/ksquares/; revision=1294007