RotateMatrix

/**
	 * Given an image represented by an NxN matrix, where each pixel in the
	 * image is 4 bytes, write a method to rotate the image by 90 degrees.
Can
	 * you do this in place?
	 * 
	 * */
	
	/**
	 *    Input:
	 *    
	 *      1   2   3   4
	 *      5   6   7   8
	 *      9   10  11  12
	 *      13  14  15  16
	 *    
	 *    Output:
	 *    
	 *    	13	9	5	1	
	 *		14	10	6	2	
	 * 		15	11	7	3	
	 *		16	12	8	4
	 * 
	 * */