added code snippet

Author: dabit3

README.md

@@ -33,12 +33,19 @@
 
 ![Buttons](http://i.imgur.com/aZNhgFp.png)
 
+```
+<Button
+  raised
+  icon={{name: 'cached'}}
+  title='RAISED WITH ICON' />
+```
+
 | Prop | default | Type | Description |
 | ---- | ---- | ----| ---- |
 | buttonStyle | none | object | add additional styling for button component |
 | title | none | string | button title | 
 | onPress | none | function | onPress method |
-| icon | none | string | [Material Icon Name](https://design.google.com/icons/) | 
+| icon | none | object {name(string), color(string), size(string)} | [Material Icon Name](https://design.google.com/icons/) | 
 | secondary | false | boolean | secondary button flag |
 | backgroundColor | primary color | string (color) | background color of button |
 | color | white | string(color) | font color |