add gut testing framework

game/test/tests.tscn

@@ -0,0 +1,38 @@
+[gd_scene load_steps=2 format=2]
+
+[ext_resource path="res://addons/gut/gut.gd" type="Script" id=1]
+
+[node name="Gut" type="Control"]
+self_modulate = Color( 1, 1, 1, 0 )
+anchor_right = 1.0
+anchor_bottom = 1.0
+rect_min_size = Vector2( 740, 250 )
+script = ExtResource( 1 )
+__meta__ = {
+"_edit_use_anchors_": false
+}
+_select_script = ""
+_tests_like = ""
+_inner_class_name = ""
+_run_on_load = false
+_should_maximize = false
+_should_print_to_console = true
+_log_level = 1
+_yield_between_tests = false
+_disable_strict_datatype_checks = false
+_test_prefix = "test_"
+_file_prefix = "test_"
+_file_extension = ".gd"
+_inner_class_prefix = "Test"
+_temp_directory = "user://gut_temp_directory"
+_export_path = ""
+_include_subdirectories = false
+_directory1 = "res://test/unit"
+_directory2 = ""
+_directory3 = ""
+_directory4 = ""
+_directory5 = ""
+_directory6 = ""
+_double_strategy = 1
+_pre_run_script = ""
+_post_run_script = ""

game/test/unit/test_example.gd

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+extends "res://addons/gut/test.gd"
+func before_each():
+	gut.p("ran setup", 2)
+
+func after_each():
+	gut.p("ran teardown", 2)
+
+func before_all():
+	gut.p("ran run setup", 2)
+
+func after_all():
+	gut.p("ran run teardown", 2)
+
+func test_assert_eq_number_not_equal():
+	assert_eq(1, 2, "Should fail.  1 != 2")
+
+func test_assert_eq_number_equal():
+	assert_eq('asdf', 'asdf', "Should pass")
+
+func test_assert_true_with_true():
+	assert_true(true, "Should pass, true is true")
+
+func test_assert_true_with_false():
+	assert_true(false, "Should fail")
+
+func test_something_else():
+	assert_true(false, "didn't work")