Start adding UI for loading sounds in the editor
Correctly load sound in the editor on add
Add support for sound layers
Adding support for saving/loading sound layers
Add support for sound sources
Add missing file
Support replaying mapsounds
Add editor support for editing sound source properties
Improve sound replay
Working on correctly replay sounds
Fix saving of sounds
Take sample duration into account when enqueuing sound sources
Add embedded sound support
Remove debug rendering for sound layers and unused item members
Start adding a sound envelope
Fix crash when loading sound files threaded (double io_close)
Add support to modulate voice volume and falloff distance
Remove distance from envelopes, add falloff distance to source properties and render it in the editor
Add support for position envelopes to sound sources
Ingame sound pos envelope support