Added Spectator Keyframes and handles them properly in both normal and rendered Replay Paths

src/main/java/eu/crushedpixel/replaymod/holders/Position.java

@@ -1,5 +1,6 @@
 package eu.crushedpixel.replaymod.holders;
 
+import net.minecraft.client.Minecraft;
 import net.minecraft.entity.Entity;
 import org.apache.commons.lang3.builder.HashCodeBuilder;
 
@@ -8,6 +9,10 @@ public class Position {
     private double x, y, z;
     private float pitch, yaw, roll;
 
+    public Position(int entityID) {
+        this(Minecraft.getMinecraft().theWorld.getEntityByID(entityID));
+    }
+
     public Position(Entity e) {
         this.x = e.posX;
         this.y = e.posY;