libtorc-audio: Sundry minor whitespace cleanups in AudioOutput
libtorc-audio: Add missing avcodec_get_frame_defaults in AudioDecoder
libtorc-audio: Whitespace cleanup in AudioOutputALSA
libtorc-audio: Fix settings retrieval in AudioOutputALSA

- GetSetting needs explicit types to invoke the correct method. Should
probably fix that...
libtorc-audio: Improve the most important audio log item...
libtorc-qml: Use another framebuffer object in VideoVDPAU

- this simplifies the code considerably, and in theory should be faster.
- in reality, an ION1 still can't keep up with 60fps rendering (even
with single digit CPU utilisation) - but this is probably a reflection
of the TorcQMLMediaElement implementation.