* Added Spectrum analyzer demo application.
* Added exit softkey to Wiggly example.
* Added close button to Anomaly demo.
* Fixed Anomaly demo controlstrip icon placement for very small screens.
* Ensure history configuration is cleared when a state machine is restarted.
For more read: http://qt.nokia.com/developer/changes/changes-4.6.3
* Optimized empty QUrl creation
* Improve performance of getting the canonical filename on Linux
and Symbian by using realpath() system call.
* Avoid stat() when opening a file.
* Do not look at the Qt patch-level version embedded in plugins'
buildkeys when trying to determine if the plugin is compatible
* Bug-fixes
* load() and loadFromData() can now support compressed GL textures
in the DDS, ETC1, PVRTC2, and PVRTC4 formats if the OpenGL graphics
system is active and the appropriate extensions are present in the
GL implementation.
* Fixed a small leak when using the new QPixmapCache::Key based API.
