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/interpolation/LinearInterpolation.java

@@ -24,10 +24,6 @@ public abstract class LinearInterpolation<K> implements Interpolation<K> {
         points.add(point);
     }
 
-    public void clearPoints() {
-        points = new ArrayList<K>();
-    }
-
     protected Pair<Float, Pair<K, K>> getCurrentPoints(float position) {
         if(points.size() == 0) return null;
         position = position * (points.size() - 1);

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

@@ -24,8 +24,6 @@ public class LinearPoint extends LinearInterpolation<Position> {
 
         float rot = (float)getInterpolatedValue(first.getRoll(), second.getRoll(), perc);
 
-        Position inter = new Position(x, y, z, pitch, yaw, rot);
-
-        return inter;
+        return new Position(x, y, z, pitch, yaw, rot);
     }
 }

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

@@ -14,8 +14,6 @@ public class LinearTimestamp extends LinearInterpolation<Integer> {
         int first = pair.second().first();
         int second = pair.second().second();
 
-        int val = (int) getInterpolatedValue(first, second, perc);
-
-        return val;
+        return (int) getInterpolatedValue(first, second, perc);
     }
 }

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

@@ -7,7 +7,6 @@ import java.lang.reflect.InvocationTargetException;
 import java.util.Vector;
 
 public class SplinePoint extends BasicSpline implements Interpolation<Position> {
-    private static final Object[] EMPTYOBJ = new Object[]{};
     private Vector<Position> points;
     private Vector<Cubic> xCubics;
     private Vector<Cubic> yCubics;