Fix all warnings

Add and make use of Lombok
Remove Mojang API
Remove ZipFileUtils
Remove StreamTools in favor of Apache IOUtils
Keyframe should be abstract all derivatives final
Replace clone in Keyframe with copy
Move some constants from GuiReplaySetttings to GuiConstants

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

@@ -1,33 +1,15 @@
 package eu.crushedpixel.replaymod.holders;
 
-public class Keyframe {
+import lombok.AllArgsConstructor;
+import lombok.Data;
+import lombok.EqualsAndHashCode;
+
+@Data
+@EqualsAndHashCode
+@AllArgsConstructor
+public abstract class Keyframe {
 
     private int realTimestamp;
 
-    public Keyframe clone() {
-        return new Keyframe(realTimestamp);
-    }
-
-    public Keyframe(int realTimestamp) {
-        this.realTimestamp = realTimestamp;
-    }
-
-    public int getRealTimestamp() {
-        return realTimestamp;
-    }
-
-    public void setRealTimestamp(int realTimestamp) { this.realTimestamp = realTimestamp; }
-
-    @Override
-    public boolean equals(Object o2) {
-        if(o2 == null) return false;
-        if(!(o2 instanceof Keyframe)) return false;
-        Keyframe kf = (Keyframe)o2;
-        return hashCode() == kf.hashCode();
-    }
-
-    @Override
-    public int hashCode() {
-        return realTimestamp;
-    }
+    public abstract Keyframe copy();
 }