Update python docs

bindings/python/doc/index.rst

@@ -25,6 +25,7 @@ them on sample data in real time. Please give feedback through these `channels`_
    Examples <examples>
    Layers Library Reference  <layerref>
    Python API Reference <apireference>
+   Readers, Multi-GPU, Profiling...<readersprofetc>
    Extending CNTK <extend>
    Known Issues <knownissues>
 

bindings/python/doc/readersprofetc.rst

@@ -0,0 +1,8 @@
+Readers, Multi-GPU, Profiling...
+==============================
+
+For extending readers in CNTK, please follow `these instructions <https://github.com/Microsoft/CNTK/wiki/Understanding-and-Extending-Readers>`__
+
+For multi-GPU and multi-machine usage, please follow `these <https://github.com/Microsoft/CNTK/wiki/Multiple-GPUs-and-machines>`__
+
+For profiling, please refer to `these <https://github.com/Microsoft/CNTK/wiki/Performance-Profiler>`__