CB-11487 (browser) Documented AutoHideSplashScreen for browser

this closes #107

Author: alsorokin

README.md

@@ -451,6 +451,7 @@ You can use the following preferences in your `config.xml`:
 ```xml
 <platform name="browser">
     <preference name="SplashScreen" value="/images/browser/splashscreen.jpg" /> <!-- defaults to "/img/logo.png" -->
+    <preference name="AutoHideSplashScreen" value="true" /> <!-- defaults to "true" -->
     <preference name="SplashScreenDelay" value="3000" /> <!-- defaults to "3000" -->
     <preference name="SplashScreenBackgroundColor" value="green" /> <!-- defaults to "#464646" -->
     <preference name="ShowSplashScreen" value="false" /> <!-- defaults to "true" -->