add gut testing framework

game/test/unit/test_example.gd

@@ -0,0 +1,27 @@
+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")