Refactor to support running both in the editor and in game UIs.

Here I add a `ScreenReader` `Node` which, when added to the `SceneTree`, should read the contents of any supported `Control`. I also do a bit of cleanup on filenames, as well as breaking the editor plugin support into its own class.

Plugin.gd

@@ -0,0 +1,12 @@
+tool
+extends EditorPlugin
+
+var ScreenReader = preload("ScreenReader.gd")
+
+var screen_reader
+
+func _enter_tree():
+    screen_reader = ScreenReader.new()
+    get_tree().root.call_deferred("add_child", screen_reader)
+    call_deferred("connect", "scene_changed", screen_reader, "set_initial_scene_focus")
+    call_deferred("connect", "main_screen_changed", screen_reader, "set_initial_screen_focus")

ScreenReader.gd

@@ -1,7 +1,6 @@
-tool
+extends Node
-extends EditorPlugin
 
-var Accessible = preload("accessible.gd")
+var Accessible = preload("Accessible.gd")
 
 var TTS = preload("../godot-tts/TTS.gd")
 
@@ -49,14 +48,3 @@ func set_initial_scene_focus(scene):
 func _enter_tree():
     tts = TTS.new()
     get_tree().connect("node_added", self, "augment_tree")
-    connect("scene_changed", self, "set_initial_scene_focus")
-    connect("main_screen_changed", self, "set_initial_screen_focus")
-
-func _exit_tree():
-    # Clean-up of the plugin goes here
-    pass
-
-func _notification(what):
-    # print("Notified: %s" % what)
-    if what == MainLoop.NOTIFICATION_WM_QUIT_REQUEST:
-        print("User requested the project to quit")

plugin.cfg

@@ -4,4 +4,4 @@ name="Accessibility"
 description="An accessibility layer for Godot."
 author="Nolan Darilek"
 version="0.1.0"
-script="accessibility.gd"
+script="Plugin.gd"