Added comments and License.

Signed-off-by: Abhijit Kumar <abhikumar@manh.com>
Program to generate next smallest palindrome larger than any given number. Implementation of algo presented at
http://www.geeksforgeeks.org/given-a-number-find-next-smallest-palindrome-larger-than-this-number/

Signed-off-by: Abhijit Kumar <abhikumar@manh.com>