Add show_menu and hide_menu ESC commands

Fixes godot-escoria/escoria-issues#48
Fix: tween was stopped_all before starting


Fix: reload locale from settings in ESCGame

Since main menu and pause menu are now loaded from ESCGame and not from escoria.gd, this must be done here.
Fix: small crash in load game

But save and load are broken at the moment...
Fix: check save and load after main menu changes


Required fixes


Fix: manage the game scene better in show and hide_menu


Enh: transition back in to the previous room if there was one


Fix a bug occurring where change_scene awaits forever for setup to end


Reworked change_scene and esc_room implementation to avoid yielding


Added a controller variable to allow new event run in events_manager


Don't empty the events queue if the running_event was interrupted


Fixed transitions and automatic transitions in change_scene

Added trace log level (for esc_compiler in particular)
Fixed various bugs in ESC scripts
Fix a bug where exit_scene happened multiple times where fast walking

Needed to clear the event queue
Fixes ready event was run because BYPASS_LAST_SCENE wrongly set


Inverted parameter "disable_automatic_transitions"

for change_scene, hide_menu, show_menu commands
Fix broken sched_event


Fixes as requested in PR

game/rooms/room14/r_door.tscn

@@ -0,0 +1,25 @@
+[gd_scene load_steps=3 format=2]
+
+[ext_resource path="res://addons/escoria-core/game/core-scripts/esc_item.gd" type="Script" id=1]
+[ext_resource path="res://addons/escoria-core/game/core-scripts/esc_location.gd" type="Script" id=2]
+
+[node name="r_door" type="Area2D"]
+pause_mode = 1
+script = ExtResource( 1 )
+__meta__ = {
+"_editor_description_": ""
+}
+global_id = "r1_r_exit"
+esc_script = "res://game/rooms/room01/esc/right_exit.esc"
+is_exit = true
+tooltip_name = "Exit"
+default_action = "walk"
+dialog_color = Color( 1, 1, 1, 1 )
+animations = null
+
+[node name="CollisionPolygon2D" type="CollisionPolygon2D" parent="."]
+polygon = PoolVector2Array( 1177.94, 348.61, 1175.95, 45.3759, 1276.06, 92.0953, 1277.95, 399.407 )
+
+[node name="Position2D" type="Position2D" parent="."]
+position = Vector2( 1225.47, 353.99 )
+script = ExtResource( 2 )