Added links to another problem sets

Author: grogy

problem-sets-competitive-programming.md

@@ -23,6 +23,7 @@
 * [Anarchy Golf](http://golf.shinh.org/)
 * [Caribbean Online Judge](http://coj.uci.cu/24h/problems.xhtm)
 * [CheckIO](http://www.checkio.org/)
+* [CodeHunt](https://www.codehunt.com/)
 * [Coding Bat](http://codingbat.com/java)
 * [Google Code Jam - Practise](https://code.google.com/codejam/contests.html)
 * [Hacker.org](http://www.hacker.org/)
@@ -31,5 +32,6 @@
 * [Ponder This!](http://domino.research.ibm.com/Comm/wwwr_ponder.nsf/pages/index.html)
 * [Project Euler](https://projecteuler.net/)
 * [Sphere Online Judge](http://www.spoj.com/)
+* [TalentBuddy](http://www.talentbuddy.co/)
 * [Timus Online Judge](http://acm.timus.ru/)
 * [UVa Online Judge](http://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8)