changelog: alligator arena, documentation and known limits for 0.2.1; current launcher and editor screenshots everywhere, coaster in the readme pictures

README.md

@@ -20,16 +20,16 @@ More pictures:
 
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-| ![LlamaMod launcher](docs/img/launcher.jpg) | ![Level editor](docs/img/editor.jpg) |
-| **Launcher**: mods with options, save-game editor, one-click play | **Level editor**: brushes, tiles, meshes, objects, textures, play-test with F5 |
 | ![Test World gallery](docs/img/testworld-gallery.jpg) | ![Alligator Arena](docs/manual/img/mod_arena.jpg) |
 | **Test World**: all 253 figures and objects of the game in one level | **Alligator Arena**: a minigame with new, scripted enemies |
-| ![Debug view](docs/img/debug-view.jpg) | ![glTF in Blender](docs/img/gltf-blender.jpg) |
-| **Debug view**: collision and invisible objects in the running game | **glTF/OBJ** export and import for Blender |
+| ![Llama Coaster](docs/manual/img/mod_coaster.jpg) | ![Debug view](docs/img/debug-view.jpg) |
+| **Llama Coaster**: a new roller coaster track for the catacombs cart | **Debug view**: collision and invisible objects in the running game |
+| ![glTF in Blender](docs/img/gltf-blender.jpg) | |
+| **glTF/OBJ** export and import for Blender | |
 
 ## Features
 
-* **Mods** – tick, *Apply*, *Play*: Test World, Alligator Arena, your own levels, Boot to level,
+* **Mods** – tick, *Apply*, *Play*: Test World, Alligator Arena, Llama Coaster, your own levels, Boot to level,
   Intro skip, Mirror mode, Practice tools (save/restore position, extra checkpoints), Randomizer,
   Draw distance, Built-in cheats, Debug wireframe, Free camera & noclip.
 * **Level editor** – new levels from templates or editing the original levels; brushes, the base