Added github and colab links (#4972)

* nst colab

* downloaded py filed

* Removed text. Use gdoc for reviewing text, py for code

* update ipynb

* Removed google3 imports and added images

* nst update images

* final updates

* add github and colab links

* removed py file again

research/nst_blogpost/4_Neural_Style_Transfer_with_Eager_Execution.ipynb

@@ -8,7 +8,7 @@
    },
    "source": [
     "# Neural Style Transfer with tf.keras\n",
-    "In this tutorial, we will learn how to use deep learning to compose images in the style of another image (ever wish you could paint like Picasso or Van Gogh?). This is known as**neural style transfer**! This is a technique outlined in [Leon A. Gatys' paper, A Neural Algorithm of Artistic Style](https://arxiv.org/abs/1508.06576), which is a great read, and you should definitely check it out. \n",
+    "In this tutorial, we will learn how to use deep learning to compose images in the style of another image (ever wish you could paint like Picasso or Van Gogh?). This is known as **neural style transfer**! This is a technique outlined in [Leon A. Gatys' paper, A Neural Algorithm of Artistic Style](https://arxiv.org/abs/1508.06576), which is a great read, and you should definitely check it out. \n",
     "\n",
     "But, what is neural style transfer?\n",
     "\n",
@@ -56,6 +56,20 @@
     "**Time Estimated**: 30 min\n"
    ]
   },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "<table class=\"tfo-notebook-buttons\" align=\"left\">\n",
+    "  <td>\n",
+    "    <a target=\"_blank\" href=\"https://colab.research.google.com/github/tensorflow/models/blob/master/research/nst_blogpost/4_Neural_Style_Transfer_with_Eager_Execution.ipynb\"><img src=\"https://www.tensorflow.org/images/colab_logo_32px.png\" />Run in Google Colab</a>\n",
+    "  </td>\n",
+    "  <td>\n",
+    "    <a target=\"_blank\" href=\"https://github.com/tensorflow/models/blob/master/research/nst_blogpost/4_Neural_Style_Transfer_with_Eager_Execution.ipynb\"><img src=\"https://www.tensorflow.org/images/GitHub-Mark-32px.png\" />View source on GitHub</a>\n",
+    "  </td>\n",
+    "</table>"
+   ]
+  },
   {
    "cell_type": "markdown",
    "metadata": {},