Add research lab planets and research points (#63)

tests/_skill_menu_preview.gd

@@ -8,7 +8,13 @@ extends Node2D
 #   ... and again at 720x960 to check a shorter screen format.
 
 
-func _ready() -> void:
+var configured: bool = false
+
+
+func _process(_delta: float) -> void:
+	if configured:
+		return
+	configured = true
 	GameState.buildings.clear()
 	GameState.extractors.clear()
 	GameState.transporters.clear()
@@ -16,9 +22,12 @@ func _ready() -> void:
 	GameState.gas = 36
 	GameState.fleet_cargo = 24
 	GameState.fleet_gas_cargo = 12
-	GameState.unlocked = ["shipyards", "logistics", "freight"]
+	GameState.research_points = 0
+	GameState.unlocked = ["shipyards"]
 	var main: Node = load("res://Main.tscn").instantiate()
 	add_child(main)
+	main.get_node("EnemySpawner").set_process(false)
+	main.get_node("AsteroidField").set_process(false)
 	main.get_node("BuildingField").place(GameState.BUILDING_MOTHERSHIP, Vector2(400.0, 0.0))
 	var mothership_id: int = int(GameState.buildings[-1].id)
 	var bc: Node = main.get_node("BuildController")
@@ -27,5 +36,5 @@ func _ready() -> void:
 	main.get_node("UI/SkillMenu").visible = true
 	# Select a node so the description, price and status all have text - an
 	# empty description cannot collide with anything.
-	bc.skill_tree.selected_id = "freight"
-	bc._refresh_skill_menu("freight")
+	bc.skill_tree.selected_id = "coordination"
+	bc._refresh_skill_menu("coordination")