Update README.md

Author: mreram

README.md

@@ -6,10 +6,14 @@
 </p>
 Sample usage in your activity:
 
-    GuideView guideView = new GuideView(this, view);
-    guideView.setTitle("Guide Title Text");
-    guideView.setContentText("Guide Description Text\n .....Guide Description Text\n .....Guide Description Text .....");
-    guideView.setGravity(GuideView.Gravity.CENTER); //optional - default is AUTO
-    guideView.show();
+     new GuideView.Builder(this)
+             .setTitle("Guide Title Text")
+             .setContentText("Guide Description Text\n .....Guide Description Text\n .....Guide Description Text .....")
+             .setGravity(GuideView.Gravity.CENTER)//optional
+             .setTargetView(view)
+             .setContentTextSize(12)//optional
+             .setTitleTextSize(14)//optional
+             .build()
+             .show();