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;

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

@@ -5,10 +5,11 @@ import org.apache.commons.lang3.builder.HashCodeBuilder;
 public class PositionKeyframe extends Keyframe {
 
     private Position position;
+    private Integer spectatedEntityID = null;
 
     @Override
     public Object clone() {
-        return new PositionKeyframe(this.getRealTimestamp(), this.getPosition());
+        return new PositionKeyframe(this.getRealTimestamp(), this.getPosition(), this.getSpectatedEntityID());
     }
 
     public PositionKeyframe(int realTime, Position position) {
@@ -16,12 +17,24 @@ public class PositionKeyframe extends Keyframe {
         this.position = position;
     }
 
+    public PositionKeyframe(int realTime, Position position, int spectatedEntityID) {
+        super(realTime);
+        this.position = position;
+        this.spectatedEntityID = spectatedEntityID;
+    }
+
+    public PositionKeyframe(int realTime, int spectatedEntityID) {
+        this(realTime, new Position(spectatedEntityID), spectatedEntityID);
+    }
+
     public Position getPosition() {
         return position;
     }
 
     public void setPosition(Position position) { this.position = position; }
 
+    public Integer getSpectatedEntityID() { return spectatedEntityID; }
+
     @Override
     public boolean equals(Object o2) {
         if(o2 == null) return false;
@@ -35,6 +48,7 @@ public class PositionKeyframe extends Keyframe {
         return new HashCodeBuilder(17, 37)
                 .append(getPosition())
                 .append(getRealTimestamp())
+                .append(getSpectatedEntityID())
                 .toHashCode();
     }
 }