Update README.md

Specified xml syntax highlight

Author: bilthon

README.md

@@ -7,19 +7,20 @@ Android custom view that displays a simple Speedometer.
 
 The setup of the custom view should be as simple as placing this snippet in your xml layout:
 
-	<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
-		xmlns:tools="http://schemas.android.com/tools"
-		xmlns:custom="http://schemas.android.com/apk/res/com.luminiasoft.labs.views"
-		android:layout_width="match_parent"
-		android:layout_height="match_parent">
-		<com.luminiasoft.labs.views.Speedometer
-			android:id="@+id/Speedometer"
-		    android:layout_width="wrap_content"
-		    android:layout_height="wrap_content"
-		    custom:currentSpeed="100"
-		    custom:maxSpeed="300" />
-	</RelativeLayout>
-	
+```xml
+<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
+	xmlns:tools="http://schemas.android.com/tools"
+	xmlns:custom="http://schemas.android.com/apk/res/com.luminiasoft.labs.views"
+	android:layout_width="match_parent"
+	android:layout_height="match_parent">
+	<com.luminiasoft.labs.views.Speedometer
+		android:id="@+id/Speedometer"
+	    android:layout_width="wrap_content"
+	    android:layout_height="wrap_content"
+	    custom:currentSpeed="100"
+	    custom:maxSpeed="300" />
+</RelativeLayout>
+```	
 
 Of course, don't forget to include the `/values/attrs.xml` file in your project for this to work.