Create ChallengesEditGUI class that will allow to edit challenges via…

… ingame GUI.

This GUI currently does not have ability to change values. It only contains skeleton for each option, that user should be able to change.
Add new parameters to Challenges class.

src/main/java/world/bentobox/challenges/database/object/Challenges.java

@@ -25,6 +25,43 @@ public class Challenges implements DataObject {
 
     public Challenges() {}
 
+
+    public boolean isRemoveEntities()
+    {
+        return false;
+    }
+
+
+    public void setRemoveEntities(boolean b)
+    {
+
+    }
+
+
+    public boolean isRemoveBlocks()
+    {
+        return false;
+    }
+
+
+    public void setRemoveBlocks(boolean b)
+    {
+
+    }
+
+
+    public boolean isTakeExperience()
+    {
+        return false;
+    }
+
+
+    public void setTakeExperience(boolean b)
+    {
+
+    }
+
+
     public enum ChallengeType {
         /**
          * This challenge only shows and icon in the GUI and doesn't do anything.