added CNTK to Frameworks section

README.md

@@ -454,7 +454,7 @@
 43.  [nolearn - wrappers and abstractions around existing neural network libraries, most notably Lasagne](https://github.com/dnouri/nolearn)
 44.  [Sonnet - a library for constructing neural networks by Google's DeepMind](https://github.com/deepmind/sonnet)
 45.  [PyTorch - Tensors and Dynamic neural networks in Python with strong GPU acceleration](https://github.com/pytorch/pytorch)
-
+46.  [CNTK - Microsoft Cognitive Toolkit](https://github.com/Microsoft/CNTK)
 
 ### Miscellaneous