Additions to RL frameworks

Two additions for Reinforcement Learning frameworks:
- TensorForce: https://github.com/reinforceio/tensorforce
- NervanaSystems Coach: https://github.com/NervanaSystems/coach

README.md

@@ -485,6 +485,8 @@
 47.  [Serpent.AI - Game agent framework: Use any video game as a deep learning sandbox](https://github.com/SerpentAI/SerpentAI)
 48.  [Caffe2 - A New Lightweight, Modular, and Scalable Deep Learning Framework](https://github.com/caffe2/caffe2)
 49.  [deeplearn.js - Hardware-accelerated deep learning and linear algebra (NumPy) library for the web](https://github.com/PAIR-code/deeplearnjs)
+50.  [TensorForce - A TensorFlow library for applied reinforcement learning](https://github.com/reinforceio/tensorforce)
+51.  [Coach - Reinforcement Learning Coach by Intel® AI Lab](https://github.com/NervanaSystems/coach)
 
 ### Miscellaneous