Rework rendering

Adds default, stereoscopic, tiling, cubic and equirectangular frame rendering

src/main/java/eu/crushedpixel/replaymod/interpolation/Interpolation.java

@@ -0,0 +1,7 @@
+package eu.crushedpixel.replaymod.interpolation;
+
+public interface Interpolation<T> {
+    void prepare();
+    T getPoint(float position);
+    void addPoint(T pos);
+}