Allowed GuiTimeline instances to have any height (instead of fixed 22px height) and updated draw() method accordingly

Added HSV noise to GuiTimeline's textures to somewhat hide the repeating body texture
Implemented GuiTimeline in GuiObjectManager's GuiObjectKeyframeTimeline
Added asInt() method to TimestampValue, to avoid int casts of value field

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

@@ -12,6 +12,10 @@ public class TimestampValue implements KeyframeValue {
     @Interpolate
     public double value;
 
+    public int asInt() {
+        return (int)value;
+    }
+
     @Override
     public TimestampValue newInstance() {
         return new TimestampValue();