Phonon/Releases/VLC/0.7.0

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phonon4qt5-backend-vlc is a feature equivalent VLC powered backend built against Qt 5 rather than Qt 4. Phonon4Qt5 VLC is built from the same source; requires the cmake option PHONON_BUILD_PHONON4QT5, libphonon4qt5 and a separate build directory from Qt 4.
Support VLC 2.1.0's upcoming appid API setting more application information for PulseAudio.
Reduce performance overhead in audio/video-less setups by not loading dummy plugins at all and removing unnecessary dynamic loading logic.
Internal API redesign to ensure important abstract code is executed.
Partially backed new MediaController subtitle API (explicit font setting is not working as expected in VLC 2.0)
Implement equalizer Effect support. This is only going to appear in VLC 2.2, so the feature remains not present when built against lower versions [#323331].
When building against VLC 2.1 the new video title API is used to disable displaying the video title when a video starts to play. This is going to replace the manually set argument for libvlc_new in the long run.
Phonon VLC is now the highest rated backend due to its high quality. This means that whenever an additional backend is installed and the user did not choose a preferred backend Phonon VLC will be used by default.

Stride calculation for surface painting is done correctly now (affects VideoWidget inside QProxyWidget)
Queued tracks are now correctly played when the current track is about to end [r107118].
DirectSound and CoreAudio are no longer marked as advanced devices. This makes auto-selection of devices work on Windows and OSX.
Track selection on AudioCds via the MediaController is now working as intended.
Prevent libpa crashes due to empty user-agent information.
Reduce scope of non-reentrant PulseAudio envrionment setup. Limited due to missing API backing in libvlc [#321288].
Subtitle selection now uses correct index mapping preventing off-by-one issues.