add demos page in doc with videos

docs/_sidebar.md

@@ -1,6 +1,7 @@
 - Getting Started
   - [Introduction](/)
   - [API](api.md)
+  - [Demos](demos.md)
   - [Unstable API](unstable_api.md)
   - [Contribute](contribute.md)
   - [History](history.md)

docs/demos.md

@@ -0,0 +1,19 @@
+## mineflayer-navigate
+
+[navigate](https://github.com/andrewrk/mineflayer-navigate/) - get around
+   easily using A* pathfinding
+
+<iframe type="text/html" width="640" height="360" src="http://www.youtube.com/embed/O6lQdmRz8eE" frameborder="0"></iframe>
+
+## rbot
+
+[rom1504/rbot](https://github.com/rom1504/rbot) smart bot based on mineflayer
+
+<iframe type="text/html" width="640" height="360" src="http://www.youtube.com/embed/0cQxg9uDnzA" frameborder="0"></iframe>
+
+## chaoscraft
+
+[Chaoscraft](https://github.com/schematical/chaoscraft) Minecraft bot using genetic algorithms
+
+
+​<iframe width="640" height="360" src="https://www.youtube.com/embed/videoseries?list=PLLkpLgU9B5xJ7Qy4kOyBJl5J6zsDIMceH" frameborder="0" allow="autoplay; encrypted-media" allowfullscreen></iframe>