v2.1.9_NRK
o Add some mixer and tween properties to OSC
o Add individual layer audio levels to OSC
o Add producer type and channel layout to OSC
o Add improved parameter syntax to STING transitions
o Add audio fade properties to STING transitions
o Add audio fade properties to STING transitions
o Add log lines if an portion of the channel tick takes too long (mixer/producers/consumers)
o Backport some opengl performance improvements
o Add config structure to preallocate opengl buffers at startup
o Initial support for running channels at custom resolutions
o Add support for a LOAD without parameters, to move the background producer into the foreground as paused
o Add CLEAR_ON_404 parameter to LOAD/LOADBG/PLAY, to use an empty producer if the original command 404 errors