Update README.md

Author: sunilsharma08

README.md

@@ -76,6 +76,9 @@ if (igcMenu == nil) {
   igcMenu.menuSuperView = self.view;      //Pass reference of menu button super view
   igcMenu.disableBackground = YES;        //Enable/disable menu background
   igcMenu.numberOfMenuItem = 5;           //Number of menu items to display
+  
+  //Menu background. It can be BlurEffectExtraLight,BlurEffectLight,BlurEffectDark,Dark or None
+  igcMenu.backgroundType = BlurEffectDark;
 
 /* Optional
 Pass name of menu items