more Kotlin, UIs now can open/close with animation, working world time with skybox colour changing (sunlight transition is still WIP), fixed project library settings so that the suggestion in IntelliJ IDEA would work properly

Former-commit-id: 82c857164f2636ad943d5a43f0690a3431ab0f26
Former-commit-id: 7c8b70e6b267f7c5c050d7d0902278739ec18b44

res/batchtest.txt

@@ -1,4 +1,5 @@
-echo "Hello, world!"
-echo "This is a batch test."
+echo "Hello, world! This is a batch test."
+echo "Will add actorvalue 'batch = true' to player"
 setav batch true
+echo "Checking if command did something."
 getav batch