Fix compatibility with atom 1.9.x #979

Due to changes between atom 1.8 and 1.9 is editor.viewRegistry not availbale,
it has to be changed to atom.views.

src/beautify.coffee

@@ -28,10 +28,10 @@ $ = null
 # return data;
 # }
 getScrollTop = (editor) ->
-  view = editor.viewRegistry.getView(editor)
+  view = atom.views.getView(editor)
   view.getScrollTop()
 setScrollTop = (editor, value) ->
-  view = editor.viewRegistry.getView(editor)
+  view = atom.views.getView(editor)
   view.setScrollTop value
 
 getCursors = (editor) ->