Moved common functions to GameKit.gd

- GameKit.gd is meant to act as library. Right now it contains functions for simplfying game pausing and making it easier to switch between commonly used scenes. This should ONLY be used for scripts that inherent the base node type (i.e. Node).
- Screenshot was updated to remove the menu bar.

project/src/GameKit.gd

@@ -0,0 +1,17 @@
+# Anthony Wilcox licenses this file to you under the GPL license.
+# See the LICENSE file in the project root for more information.
+extends Node
+
+func is_game_paused(is_paused):
+	if is_paused == true:
+		get_tree().paused = true
+	else:
+		get_tree().paused = false
+		
+func switch_scenes(new_mode):
+	if new_mode == "classic":
+		get_tree().change_scene("res://ClassicScn.tscn")
+	elif new_mode == "modern":
+		get_tree().change_scene("res://ModernScn.tscn")
+	elif new_mode == "start":
+		get_tree().change_scene("res://StartScn.tscn")