Update 'README.md'

README.md

 * remove a specific element from an array `removeElementFromArray`
 * insert an element into an array a specific position `insertIntoArrayAt`
 * find the maximum and minimum value of an array `findMaxMinOfArray` return a 
+
+* Example of MaxMin class
 ```java
 public class MaxMin{
-    public int max;
-    public int min;
+    int max, max;
+    // ommitted setters, getters, and constructors for brevity
 }
 ```
 * remove duplicate elements from an array, return new array `removeDupesFromArray` (make it an array of Integers)