adds game over credits (#74)

## Changes
- Adds game over credits

Reviewed-on: gymkhana/gymkhana#74
Reviewed-by: Eneko Nieto <eneko@eneko.ovh>
Co-authored-by: oier <oierbravo@gmail.com>
Co-committed-by: oier <oierbravo@gmail.com>

addons/escoria-ui-return-monkey-island-dialog-simple/chooser/simple.gd

@@ -108,4 +108,4 @@ func _on_paused():
 
 # Handler managing resume notification from Escoria
 func _on_resumed():
-	show_chooser()
+	show_chooser()

addons/escoria-ui-return-monkey-island/menus/main_menu/main_menu.tscn

@@ -41,18 +41,18 @@ __meta__ = {
 }
 
 [node name="TextureRect" type="TextureRect" parent="main/main"]
-margin_top = 55.0
+margin_top = 40.0
 margin_right = 616.0
-margin_bottom = 355.0
+margin_bottom = 340.0
 texture = ExtResource( 3 )
 __meta__ = {
 "_edit_use_anchors_": false
 }
 
 [node name="buttons" type="VBoxContainer" parent="main/main"]
-margin_top = 455.0
+margin_top = 440.0
 margin_right = 616.0
-margin_bottom = 695.0
+margin_bottom = 710.0
 custom_constants/separation = 10
 __meta__ = {
 "_edit_use_anchors_": false
@@ -67,14 +67,6 @@ text = "NEW_GAME"
 __meta__ = {
 "_edit_use_anchors_": false
 }
-; [node name="new_game_without_intro" type="Button" parent="main/main/buttons"]
-; margin_right = 616.0
-; margin_bottom = 270.0
-; size_flags_vertical = 3
-; text = "NEW_GAME (without intro)"
-; __meta__ = {
-; "_edit_use_anchors_": false
-; }
 
 [node name="load_game" type="Button" parent="main/main/buttons"]
 margin_top = 160.0
@@ -92,20 +84,17 @@ margin_bottom = 210.0
 text = "OPTIONS"
 
 [node name="quit" type="Button" parent="main/main/buttons"]
-margin_top = 220.0
+margin_top = 250.0
 margin_right = 616.0
-margin_bottom = 240.0
+margin_bottom = 270.0
 text = "QUIT"
 __meta__ = {
 "_edit_use_anchors_": false
 }
 
-
-
 [connection signal="back_button_pressed" from="load_game" to="." method="_on_load_game_back_button_pressed"]
 [connection signal="back_button_pressed" from="options" to="." method="_on_options_back_button_pressed"]
 [connection signal="pressed" from="main/main/buttons/new_game" to="." method="_on_new_game_pressed"]
 [connection signal="pressed" from="main/main/buttons/load_game" to="." method="_on_load_game_pressed"]
 [connection signal="pressed" from="main/main/buttons/options" to="." method="_on_options_pressed"]
 [connection signal="pressed" from="main/main/buttons/quit" to="." method="_on_quit_pressed"]
-[connection signal="pressed" from="main/main/buttons/new_game_without_intro" to="." method="_on_new_without_intro_pressed"]