Refactored and reformatted code to use less static variables

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

@@ -2,19 +2,13 @@ package eu.crushedpixel.replaymod.holders;
 
 public class Keyframe {
 
-	private int realTimestamp;
-	
-	public Keyframe(int realTimestamp) {
-		this.realTimestamp = realTimestamp;
-	}
+    private final int realTimestamp;
 
-	public int getRealTimestamp() {
-		return realTimestamp;
-	}
+    public Keyframe(int realTimestamp) {
+        this.realTimestamp = realTimestamp;
+    }
 
-	public void setRealTimestamp(int realTimestamp) {
-		this.realTimestamp = realTimestamp;
-	}
-	
-	
+    public int getRealTimestamp() {
+        return realTimestamp;
+    }
 }