List branches in readme

README.md

@@ -15,6 +15,14 @@ Check out the [project site](http://caffe.berkeleyvision.org) for all the detail
 
 and step-by-step examples.
 
+## Custom distributions
+
+- [Intel optimized branch](https://github.com/BVLC/caffe/tree/intel) for CPU, in particular Xeon processors (HSW, BDW, Xeon Phi).
+- [OpenCL Caffe](https://github.com/BVLC/caffe/tree/opencl) e.g. for AMD or Intel devices.
+- [Windows Caffe](https://github.com/BVLC/caffe/tree/windows)
+
+## Community
+
 [![Join the chat at https://gitter.im/BVLC/caffe](https://badges.gitter.im/Join%20Chat.svg)](https://gitter.im/BVLC/caffe?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge)
 
 Please join the [caffe-users group](https://groups.google.com/forum/#!forum/caffe-users) or [gitter chat](https://gitter.im/BVLC/caffe) to ask questions and talk about methods and models.