Various additions to docs

docs/source/envs/fancy/airhockey.rst

@@ -0,0 +1,4 @@
+AirHockey
+=========
+
+TODO

docs/source/envs/fancy/index.rst

@@ -1,8 +1,17 @@
 Fancy
 =====
 
-Fancy gym also adds a couple of environments. Some of these are adaptations of existing environments while others were designed and build by us from the ground up.
+Fancy gym adds a couple of environments. Some of these are adaptations of existing environments while others were designed and build by us from the ground up.
+
+.. raw:: html
+
+   <div class='center'>
+      <img src="../../_static/imgs/Box_Pushing.gif" style="margin: 5%; width: 45%;">
+      <p>Box Pushing Task</p>
+   </div>
+   <br>
 
 .. toctree::
+   airhockey
    mujoco.md
    classic_control.md

docs/source/envs/fancy/mujoco.md

@@ -1,4 +1,4 @@
-# Custom Mujoco tasks
+# Mujoco
 
 ## Step-based Environments
 
@@ -47,7 +47,6 @@ No longer used?
 | `fancy/BallInACupGoal-v0`   | Similar to `fancy/BallInACupSimple-v0` but the ball needs to be caught at a specified goal position | 4000    | 7                | wip                   |
 -->
 
-
 ## MP Environments
 
 Many of these envs also exist as MP-variants. Refer to them using `fancy_DMP/<name>` `fancy_ProMP/<name>` or `fancy_ProDMP/<name>`.