Added dark mode option to CreateBanner() func

- Fixed PORTALSYMBOL file names
- Now using image files from assets/glyphs
- CreateBanner() func options tweaked

nmslib_test.go

@@ -10,6 +10,12 @@ func TestRndPortal(t *testing.T) {
 	fmt.Println(RndPortal())
 }
 
+func TestCreateBanner(t *testing.T) {
+	fmt.Printf("\nTesting CreateBanner: ")
+	CreateBanner(RndPortal(), "/tmp/Test.png", 11)
+	fmt.Printf("Random Portal address rendered as `/tmp/Test.png`\n\n")
+}
+
 func TestPortal2Galactic(t *testing.T) {
 	want, err := P2gc("006afa556c30")
 	if err != nil {
@@ -54,11 +60,6 @@ func TestGalactic2portal(t *testing.T) {
 	}
 }
 
-func TestCreateBanner(t *testing.T) {
-	fmt.Printf("\nTesting CreateBanner: ")
-	CreateBanner(RndPortal(), "/tmp/Test.png", 0)
-}
-
 func TestTranslate(t *testing.T) {
 	want := Translate{"Paka"}
 	if want.Atl2Eng() != "Awake" {