v0.6.0: moved important usages of collections.shuffle into Random

SPD-classes/src/main/java/com/watabou/utils/Random.java

@@ -22,7 +22,9 @@
 package com.watabou.utils;
 
 import java.util.Collection;
+import java.util.Collections;
 import java.util.HashMap;
+import java.util.List;
 
 public class Random {
 
@@ -156,6 +158,10 @@ public class Random {
 			(T)collection.toArray()[Int( size )] :
 			null;
 	}
+
+	public static<T> void shuffle( List<?extends T> list){
+		Collections.shuffle(list, rand);
+	}
 	
 	public static<T> void shuffle( T[] array ) {
 		for (int i=0; i < array.length - 1; i++) {