Fresh example screenshots

_example/barchart.go

@@ -9,7 +9,7 @@ package main
 import "github.com/gizak/termui"
 
 func main() {
-	if termui.Init() != nil {
+	if err := termui.Init(); err != nil {
 		panic(err)
 	}
 	defer termui.Close()

_example/gauge.go

@@ -68,7 +68,7 @@ func main() {
 	g4.Width = 50
 	g4.Height = 3
 	g4.Y = 14
-	g4.Border.Label = "Gauge"
+	g4.BorderLabel = "Gauge"
 	g4.Label = "Gauge with custom highlighted label"
 	g4.PercentColor = termui.ColorYellow
 	g4.BarColor = termui.ColorGreen