Add link to wiki.

README.md

@@ -27,6 +27,8 @@ As of today, the following algorithms have been implemented:
 - Continuous DQN (CDQN or NAF) [[6]](http://arxiv.org/abs/1603.00748)
 - Cross-Entropy Method (CEM) [[7]](http://learning.mpi-sws.org/mlss2016/slides/2016-MLSS-RL.pdf), [[8]](http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.81.6579&rep=rep1&type=pdf)
 
+You can find more information on each agent in the [wiki](https://github.com/matthiasplappert/keras-rl/wiki/Agent-Overview).
+
 I'm currently working on the following algorithms, which can be found on the `experimental` branch:
 
 - Asynchronous Advantage Actor-Critic (A3C) [[5]](http://arxiv.org/abs/1602.01783)