[LMP] Added AudioSource wrapper stubs.
[LMP] AudioSource richer API & metatype.
[LMP] Added SourceObject adapter.
[LMP] Output wrapper.
[LMP] Path wrapper.
[LMP] Return proper local path for URL-like audio sources.
[LMP] Added SourceObject::tick() signal.
[LMP] Properly create loical file audio sources.
[LMP] Migrate to the new engine wrappers.
[LMP] Refactored VolumeSlider to separate class.
[LMP] Removed debugging output.
[LMP] Added SourceObject::totalTimeChanged() signal.
[LMP] Refactored seeking into SeekSlider.