update Readme

README.md

 # react-native-autoheight-webview
+
 An auto height webview for React Native, even auto width for inline html.
 
 [![NPM Version](http://img.shields.io/npm/v/react-native-autoheight-webview.svg?style=flat-square)](https://www.npmjs.com/package/react-native-autoheight-webview)
     `}
     // either height or width updated will trigger this
     onSizeUpdated={({size => console.log(size.height)})},
-    // 'file:///android_asset/web/' by default on android, 
-    // web/' by default on iOS
-    baseUrl: 'webAssets/',
-    /* 
+    /*
     use local or remote files
-    to add local files: 
+    to add local files:
     add baseUrl/files... to android/app/src/assets/ on android
     add baseUrl/files... to project root on iOS
     */
         type: 'text/css',
         rel: 'stylesheet'
     }]}
+    // baseUrl now contained by source
+    // 'web/' by default on iOS
+    // 'file:///android_asset/web/' by default on Android
     // or uri
     source={{ html: `<p style="font-weight: 400;font-style: normal;font-size: 21px;line-height: 1.58;letter-spacing: -.003em;">Tags are great for describing the essence of your story in a single word or phrase, but stories are rarely about a single thing. <span style="background-color: transparent !important;background-image: linear-gradient(to bottom, rgba(146, 249, 190, 1), rgba(146, 249, 190, 1));">If I pen a story about moving across the country to start a new job in a car with my husband, two cats, a dog, and a tarantula, I wouldn’t only tag the piece with “moving”. I’d also use the tags “pets”, “marriage”, “career change”, and “travel tips”.</span></p>` }}
     // disables zoom on ios (true by default)
     zoomable={false}
-    /* 
+    /*
     other react-native-webview props
     */
   />
 ```
 
-
 ## showcase
+
 ![react-native-autoheight-webview iOS](https://media.giphy.com/media/tocJYDUGCgwac0kkyB/giphy.gif)&nbsp;
 ![react-native-autoheight-webview Android](https://media.giphy.com/media/9JyX1wZshYIxuPklHK/giphy.gif)
 
 ## demo
+
 You may have to use yarn to install the dependencies of the demo and remove "demo/node_modules/react-native-autoheight-webview/demo" manually, cause of installing a local package with npm will create symlink, but there is no supporting of React Native to symlink (https://github.com/facebook/watchman/issues/105).
-For android, you may have to copy the "C:\Users\UserName\.android\debug.keystore" to "demo/android/app/".
+For android, you may have to copy the "C:\Users\UserName\.android\debug.keystore" to "demo/android/app/".