Documentation (mostly for scenes) (#58)

Former-commit-id: 76fe4a261710ff744d09c9dd0a9b694f759fda41

examples/doc_destroySprite.hs

@@ -0,0 +1,12 @@
+#!/usr/bin/env stack
+-- stack runghc --package reanimate
+module Main(main) where
+
+import Reanimate
+import Reanimate.Builtin.Documentation
+
+main :: IO ()
+main = reanimate $ docEnv $ sceneAnimation $ do
+  s <- newSpriteSVG $ withFillOpacity 1 $ mkCircle 1
+  fork $ wait 1 >> destroySprite s
+  play drawBox