Merge korikisulda's butcher brush.

Additionally made it work with //butcher flags (added as an argument)
as well as respecting the max butcher radius if the player has the permission.

src/main/java/com/sk89q/worldedit/tools/brushes/ButcherBrush.java

@@ -0,0 +1,40 @@
+// $Id$
+/*
+ * WorldEdit
+ * Copyright (C) 2010, 2011 sk89q <http://www.sk89q.com> and contributors
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package com.sk89q.worldedit.tools.brushes;
+
+import com.sk89q.worldedit.EditSession;
+import com.sk89q.worldedit.MaxChangedBlocksException;
+import com.sk89q.worldedit.Vector;
+import com.sk89q.worldedit.patterns.Pattern;
+
+public class ButcherBrush implements Brush {
+    private int flags;
+
+    public ButcherBrush(int flags) {
+        this.flags = flags;
+    }
+
+    @Override
+    public void build(EditSession editSession, Vector pos, Pattern mat, double size)
+            throws MaxChangedBlocksException {
+        editSession.getWorld().killMobs(pos, size, flags);
+    }
+
+}