Sapphire v2.5.7: Elastika CPU optimization + resampler option.

Elastika now uses about 60% of the CPU it used to, thanks to
a complete overhaul of its physics engine.

Added an optional resampler to run Elastika at a different rate
than the engine rate. For backward compatibility, the resampler
is disabled by default.

UI improvement: the channel count sliders in Hiss, Pop, and
Split/Add/Merge now visually "snap" in steps, instead of
sliding smoothly.

plugins/Sapphire

@@ -1 +1 @@
-Subproject commit 9665f4bddb59841ef74ff206fe91345c146fed52
+Subproject commit 53464d2e626f5203e4f666069a43950481bc2b42