Big Number

	/**
	 * You have two integer arrays. Treat these arrays as if they were big
	 * numbers, with one digit in each slot. Perform addition on these two
	 * arrays and store the results in a new array.
	 * 
	 * */
	
	/**
	 * a[]:   {1, 2, 3, 4, 5, 6, 7}
	 * b[]:	  {9, 8, 7, 6, 5, 4, 3};
	 * 
	 * */