Images and Docs added to notebooks for CNTK and SQL

Tutorials/WebinarDocuments-04-04-2017/CNTK_103B_MNIST_FeedForwardNetwork.ipynb

@@ -23,7 +23,7 @@
     "\n",
     "The MNIST data comprises of hand-written digits with little background noise.\n",
     "\n",
-    "<img src=\"http://3.bp.blogspot.com/_UpN7DfJA0j4/TJtUBWPk0SI/AAAAAAAAABY/oWPMtmqJn3k/s1600/mnist_originals.png?raw=true\", width=200, height=200>\n",
+    "<img src=\"https://github.com/Azure/DataScienceVM/blob/master/Tutorials/WebinarDocuments-04-04-2017/MiscAssets/mnist_originals.png?raw=true\" width=300>\n",
     "\n",
     "\n",
     "**Goal**:\n",