Remove a useless debugging message
pulse: Improve handling of sink inputs/source outputs, mainly to catch moves to another parents
pulse: Rename private variables with confusing names
pulse: Use GUINT_TO_POINTER universally
pulse: Correctly remove sink inputs/source outputs
pulse: Rename a function to a better name
pulse: Do not hide monitor sources

Apart from being useful in some cases, application inputs may get moved to these sources (for example when changing profiles or from another application), and then the library loses track of these controls
alsa: Emit "stream-added" after the stream element is added and the stream is gettable

Fixes mate_mixer_context_get_stream() not working when the signal is received
pulse: Use property for ext-stream's MateMixerAppInfo
pulse: Optimize conversion of channel constants
Sync translations with transifex
Bump version to 1.9.2