Cleanups

Remove old code
Only depend on GStreamer for the plugins
Rename STOP to PAUSE because that's what it really does
Start working on format_fixate.
Remove default property value from props
Fix framerate

spa/lib/meson.build

@@ -2,6 +2,7 @@ spalib_sources = ['audio-raw.c',
                   'buffer.c',
                   'control.c',
                   'debug.c',
+                  'format.c',
                   'memory.c',
                   'props.c',
                   'ringbuffer.c',