Add more examples

Author: Avaer Kazmer

index.html

@@ -232,6 +232,8 @@ <h3>Examples</h3>
             <a href="https://hubs.mozilla.com/VxGmqjU/fuchsia-winding-room?vr_entry_type=vr_now" class="a-cube">Mozilla Hubs</a><br>
             <a href="https://www.cryptovoxels.com/play?vr=enabled" class="a-cube">CryptoVoxels</a><br>
             <a href="https://exokitxr.github.io/examples/exobot.html" class="a-cube">Exobot</a><br>
+            <a href="./examples/floor.html" class="a-cube">Floor</a><br>
+            <a href="./examples/subscene.html" class="a-cube">Subscene</a><br>
             <a href="./examples/example1xr.html" class="a-cube">Red Cube</a><br>
             <a href="./examples/example2xr.html" class="a-cube">Green Cube</a><br>
           </p>