POD (plain old data) objects are similar to LV2 Atoms and allows storage
and construction of datastructures in memory or on the stack. They can
be copied with a simple memcpy.
The idea is to use this to construct the network messages and to replace
the structures used for describing formats and properties.
Move array and map to pinos
Move more things to spa lib
ControlCmd -> Message
Make pinos log, use for plugins as well
work on ringbuffer in alsa and nodes
work on making registry with all objects
Remove the thread from alsa sink and use the pollfd event.
Make it possible to pass multiple fds in one pollfd event
Add 3 callbacks to the pollfd event and add support for timeouts
