Make max parameter inclusive in random method, fix #43.

Add $.radom(int max) method support.

Author: javadev

src/main/java/com/github/underscore/$.java

@@ -1708,8 +1708,12 @@ public static <E> void times(final int count, final Function<E> function) {
         }
     }
 
-    public static int random(final int from, final int to) {
-        return new Random().nextInt(to - from) + from;
+    public static int random(final int min, final int max) {
+        return min + new Random().nextInt(max - min + 1);
+    }
+
+    public static int random(final int max) {
+        return new Random().nextInt(max + 1);
     }
 
     public static long now() {

src/test/java/com/github/underscore/UtilityTest.java

@@ -1,7 +1,7 @@
 /*
  * The MIT License (MIT)
  *
- * Copyright 2015 Valentyn Kolesnikov
+ * Copyright 2016 Valentyn Kolesnikov
  *
  * Permission is hereby granted, free of charge, to any person obtaining a copy
  * of this software and associated documentation files (the "Software"), to deal
@@ -92,6 +92,27 @@ public void random() {
         assertTrue(result <= 100);
     }
 
+/*
+_.random(0, 1);
+=> 0 or 1
+*/
+    @Test
+    public void random2() {
+        int result = $.random(0, 1);
+        assertTrue(result >= 0);
+        assertTrue(result <= 1);
+    }
+
+/*
+_.random(0);
+=> 0
+*/
+    @Test
+    public void random3() {
+        int result = $.random(0);
+        assertEquals(0, result);
+    }
+
 /*
 _.now();
 => 1392066795351