Global options in GlobalConfig (was Configuration) previously
had their KDE implementation for {save,read}Options in
kcachegrind/kconfiguration.cpp. Now, save/readOptions is back
in GlobalConfig and uses the new abstractions instead.

This is needed as basis to get rid of KDE dependencies in libview/
(all views currently use KConfig based option saving/reading)

svn path=/trunk/KDE/kdesdk/kcachegrind/; revision=914401