Fix some hlint warnings, and more consistency in examples (#167)

* Remove redundant brackets

* Various hlint fixes

* Remove unused language pragrams and other fixes

* Use addStatic more consistently in examples

* Rename remaining usages of sceneAnimation to scene

examples/boundingbox.hs

@@ -10,11 +10,11 @@ main :: IO ()
 main = reanimate bbox
 
 bbox :: Animation
-bbox = bg `parA`
+bbox = addStatic bg $
     mapA (translate (-screenWidth/4) 0) bbox1 `parA`
     mapA (translate (screenWidth/4) 0) bbox2
   where
-    bg = animate $ const $ mkBackground "black"
+    bg = mkBackground "black"
 
 bbox1 :: Animation
 bbox1 = mkAnimation 5 $ \t ->