Fix https://microsoft.github.io/nni/ display issue (#643)

* Set theme jekyll-theme-minimal

* Set theme jekyll-theme-slate

* Set theme jekyll-theme-cayman

* Update README.md

* Update README.md

* Update README.md

* Update README.md

README.md

@@ -22,29 +22,31 @@ The tool dispatches and runs trial jobs generated by tuning algorithms to search
   <tbody>
     <tr align="center" valign="bottom">
       <td>
-        <b>User Code</b>
+        <b>Supported Frameworks</b>
         <img src="https://user-images.githubusercontent.com/44491713/51381727-e3d0f780-1b4f-11e9-96ab-d26b9198ba65.png"/>
       </td>
       <td>
         <b>Tuning Algorithms</b>
         <img src="https://user-images.githubusercontent.com/44491713/51381727-e3d0f780-1b4f-11e9-96ab-d26b9198ba65.png"/>
       </td>
       <td>
-        <b>Training Service Extensions</b>
+        <b>Training Services</b>
         <img src="https://user-images.githubusercontent.com/44491713/51381727-e3d0f780-1b4f-11e9-96ab-d26b9198ba65.png"/>
       </td>
     </tr>
     <tr/>
     <tr valign="top">
       <td>
-      <ul>
-        <li>CNTK</li>
-        <li>Tensorflow</li>
-        <li>PyTorch</li>
-        <li>Keras</li>
-        <li>...</li>
+        <ul>
+          <li>PyTorch</li>
+          <li>TensorFlow</li>
+          <li>Keras</li>
+          <li>MXNet</li>
+          <li>Caffe2</li>
+          <li>CNTK (Python language)</li>
+          <li>Chainer</li>
+          <li>Theano</li>
         </ul>
-        (Python based frameworks)
       </td>
       <td>
         <a href="docs/HowToChooseTuner.md">Tuner</a>
@@ -130,6 +132,7 @@ The following example is an experiment built on TensorFlow. Make sure you have *
 ```
 
 * Wait for the message `INFO: Successfully started experiment!` in the command line. This message indicates that your experiment has been successfully started. You can explore the experiment using the `Web UI url`.
+
 ```
 INFO: Starting restful server...
 INFO: Successfully started Restful server!